Mice

All the above - fogettabout it. Fox urine, mothballs, isn't going to mean squat to a cold mouse. And you have one other thing to contend with, the wire insulation which used to be made from oil is now vegetable oil. So they love to chew. They love to urinate and poop in the wall insulation. They have no worries climbing tires, and RV connectors a free path right into your RV. The damage & smell by spring can be horrifying when you open it up. Clean up can be light to OMG.

Here is the "right" solution including safety first. Please use a "Safety box" they are called rodent stations. They are generally used to nail down, or have a internal concrete block or magnet to secure the station to prevent children, pets or larger mammals at bay. They prevent a larger predator from removing the bait, such as a raccoon. These devices are used at zoo's, food purveyors, restaurants, to feed small rodents to death, spring, summer, and fall by using a chosen blood thinner. Back in the day it was grandma's Warfarin in a metered dose.... Mice have no idea & they ate too much. They suffer a harmless death painless death.

This one is magnetic... and the blocks are nailed down. www.domyownpestcontrol.com/pest-barrier-raptor-sl-bait-station-with-magnets-p-15564.html

This the block..... www.domyownpestcontrol.com/jt-eaton-bait-block-rodenticide-with-peanut-butter-flavorizer-709pn-p-7500.html

If you are on a budget - $20 at Tractor Supply, for a lower quality block.

This solution is no longer available at Lowes and Home Depot because people won't go the extra mile for the rodent station, which is very important. please do it right.

Oh and inside the trailer... try this.

old fashioned snap traps from VICTOR - and bits of slim Jim or Sesame Oil. - Outstanding.