Required Items for New Travel Trailer?

Thanks! Appreciate it Lynnmor

I'm a noob starting off as well...  The RV dealer gave us a 'starter kit' with a cheap sewer hose and water pressure regulator, so I expect to replace both of those.  For the sewer hose, I'm looking at a combination of Rhino Extreme (probably 2x 10' sections) and an attachment for flushing it out with a garden hose (vs just squirting the garden hose inside the sewer hose - yuck).  You may also want to add a sewer host support like the Camco 20ft (43051) to give you a nice slope to the dump connection.  Some places require it.

The starter kit also came with a 25' water hose which I think will be just fine.  I did purchase a Camco 40043 water filter and flex line... may go with a better filter on next go-round but at least I have the short flex hose protector. 

For drinking water, I'm actually considering a hang-bag with a Sawyer water filter like we do when back-packing.  This really gives you good drinking water no matter the source, and the Sawyer filter will protect you from bacteria and other contaminants and can be backflushed.

I bought both the Andersen and Camco 44423 leveler systems to evaluate and kept the Camco.  I have a small single-axle trailer (3500 lbs), both sets are rated at 30,000 lbs, so I went with the lighter Camco.  I also bought a bag of 10 Tri-Lynx leveling blocks, mostly to put under the corner jacks and the tongue jack.  IMO, wood weighs too much for my small trailer rig where I am trying to conserve weight any way I can.

I think the biggest questions I have are around water tank maintenance (fresh/gray/black).  Since I have a brand-new unit, I need to sanitize my fresh water lines with diluted bleach solution, sucking it in via the tap on the water pump and making sure it goes through all of my water lines.  We really don't expect to be directly drinking our fresh water on-board as we will either carry on 2.5 gal jugs of store-bought water or filtering it through the Sawyer hang bag.

We will reduce our grey water intake by short showers or washing dishes in a big bowl.  Black tank takes a little more thought / care as the guidance I've read is...

• flush the toilet with a couple gallons each time to make sure the solids make it all the way to the black tank (if necessary). 
  (Some folks even have a policy of no #2 on-board... use the CG facilities for that, lol)
• use the black tank flusher to rinse the tank as a final step before you close things up
• use the grey water dump to clean out your sewer hose  (on my trailer I have 2 grey water tanks and only the rear one shares an outlet with the black tank), and as I said I have an attachment for flushing it out with a garden hose before storing it away.
• add a few gallons of fresh water in the black tank with cleaner sloshing around while you're driving home (and maybe also your grey tank)
  

As for tools... I already carry a few of the basics in my tow vehicle anyway, but I'm going to add a small tool bag to the RV.  One set of tools I'm going to bring are battery-powered Ryboi tools - impact wrench and tire pump.  I'll use a 3/4" socket on the impact wrench to quickly raise/lower the corner jacks, and the tire pump for obvious reasons.  I'll also have a screwdriver with various adapters that match the various screws on the RV, a hammer, slip-joint Channel-Lok pliers, gorilla tape, electrical tape, a few pieces of 14-gauge wire if I need to make electrical repairs, fuses, grease rags and wipes.  

You may also want to put together a first-aid kit of whatever level of paranoia or preparedness you desire.

Take it all with a grain of salt, as I'm right where you are and trying to think of everything and run through in my head what I'm going to need to know how to do and have the tools to do it.  But, I do know how to make repairs, change a tire, diagnose electrical problems, and have done a fair amount of camping already so I can wrap my head around various scenarios that may arise.

Quick tip regarding the manual crank jacks- don't get carried away with the impact driver when using them, as you can bend things pretty easily. Those jack are for stabilizing not actual "leveling".

Having worked at an RV dealer I was able to try all manner of black tank chems. I found the old school Aqua chem stuff works best..for me.
Water is your friend in regard to the black tank- flush freely, not the place to conserve.

Pick up a 30A to 20A-(Std household outlet) adapter. Works in a pinch, you wont be able to use your A/C but you will have power for a TV and other lightweight electrical loads.

Interested in what you are pulling it with... Do you have a weight distribution hitch / sway bar?

My RV dealer set me up with a Fastway e2 with square 600lb trunnion bars... So far very happy with it.

I'm also shopping for a hitch coupler lock.  We ended up getting a fairly decent one but spendy... AMPLock U-BRP2516 for $265.

So we purchased a 2017 Toyota Highlander XLE (wife's car) back in February and we had the dealer put on a hitch when we bought it (Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2"
Item # 76156).  My wife decided she wanted to get a TT back in early May, so we started researching what TT it could tow.  I've spent hours coming the "interweb" and found good and bad for using the Highlander, but since we have it we're going to give it a shot.  It's roomy enough for the 3 kids and us (5 total) is the biggest reason.  The E160RBT is also 1,500# below the max towing weight of 5k when fully loaded.  The hitch on the TV is not rated for a WDH so we are going to see how it goes without one.  I figure we can get a sway control kit if we find it necessary.  For the brake controller we are using the Curt Echo (Curt Echo Wireless Trailer Brake Controller - 1 to 2 Axles - Proportional
Item # C51180).  I'm keeping my fingers crossed that this all works, but if I need to get a truck in the next year i wouldn't be too disappointed  .  We haven't thought about the coupler lock, but now that you said it I may have to add it to the list.

I should be picking up the TT tomorrow if everything goes as planned. So far we have purchased the following:

1. Andersen leveler with chock. I'll use some wood for the stabilizers and the hitch to start and see how that goes.
2. Camco 55301 30 Amp RV Power Defender Voltage Protector/Monitor with Integrated Surge Protection, Designed with Easy To Use PowerGrip Handles
3. Camco Brass Water Pressure Regulator with Gauge- Helps Protect RV Plumbing and Hoses from High-Pressure City Water - Easy Read Gauge, Lead Free (40064)
4. Camco 40043 TastePure RV/Marine Water Filter with Flexible Hose Protector | Protects Against Bacteria | Reduces Bad Taste, Odors, Chlorine and Sediment in Drinking Water
5. Camco 25 Feet 25ft Premium Drinking Water Lead and BPA Free, Anti-Kink Design, 20% Thicker Than Standard Hoses 5/8" Inside Diameter (22833).
6. Camco 20ft (43051) Sidewinder RV Sewer Hose Support, Made From Sturdy Lightweight Plastic, Won't Creep Closed, Holds Hoses In Place - No Need For Straps
7. Camco 20' (39742) RhinoFLEX 20-Foot RV Sewer Hose Kit, Swivel Transparent Elbow with 4-in-1 Dump Station Fitting-Storage Caps Included
8. Camco Propane Gauge/Leak Detector, Type 1 Connection for Gas Grills, RVs and Boats - 59023
9. Walex TOI-91799 Porta-Pak Holding Tank Deodorizer Drop-Ins, Sunglow Scent (Pack of 10)
10. BAL 3/4 Hex Extended Reach Drill Adapter (use this with my cordless to quickly work the stabilizers)
11. 1 ft. 12/3 15 Amp Male to 30 Amp Female Recreational Vehicle Adapter Cord (to plug in at home for the fridge to get it cold before we start any trips)
12. BougeRV RV Flying Insect Screen RV Furnace Vent Cover RV Bug Screen Covers Water Heater Screen Stainless Steel Mesh for RVs/Campers/Trailers (3Pack)

All of that was off Amazon except for items 1, 10, and 11 which we purchased from the dealer.

We do already have quite a few items such as dishes, towels, etc... We have tent camped for years and will now just use that for the TT. I'm sure with the TT we'll find items we will use and some we won't need anymore, looking forward to getting that all sorted out over time.

We're going to take Edd505's suggestion and set up in the driveway to see what we feel we'll need initially. We plan on going out locally with it next weekend and will most likely stick close to home for the first few times to get used to it and break it in (johnr read my mind).

I appreciate everyones input and comments and look forward to our family adventures with the TT. I'll keep everyone posted on our outings and I'm sure I'll be asking a bunch of questions, but how else are we supposed to learn 😁.

We have a couple RV parks within 10 miles of the house, so I'm planning to make a 2-night trial run next weekend.  We've had ours in the driveway for exactly 1 week now and have only had snacks/drinks in it so far.  Only hooked up to the 15A garage outlet atm, so can't run the A/C without adding a soft-start circuit.

We'll we finally picked up our TT yesterday and towed it home. We have it set up in our driveway and are testing it out and getting everything set up. My wife is finding creative storage solutions and I've been creating checklists for the interior, exterior, hitching/unhitching, and arrival/departure from camp. Thanks again for all the help and comments. We have definitely learned a lot from everyone and will be picking up additional supplies (i.e. another hose and extra Rhino hoses too). We'll keep it set up in the driveway and we'll be on our first trip next weekend to a nearby campground. I'll keep everyone posted on our experience (good/bad/and embarrassing).

I would suggest a complete set of quick couplers for all your hose fittings. Blast furnace hot or icy cold the last thing I want to do is fight with a hose that doesn't want to screw on. I bought a better quality set with our last trailer and moved them all over to this one. 
To me it is just quicker and easier.
Good luck
Kirt