Wheel Bearing Grease Recommendations

Below is the basic specs from the Dexter Axle Service Manual, your coach may have Lippert axles, but for me, bearing loads are bearing loads despite who made the axle.
My opinion is as long as you follow the specifications below and use a grease from a quality company you will be fine. Key is you clean all of the old grease out of the bearings as some greases are not compatible & by cleaning the bearings you give them a good inspection.
As I never seem to be able to find the same brand / type of grease from year to year, I end up switching greases, so I have used Lucas Red and Tacky Wheel bearing grease to most recently Valvoline Cerulean High Temp Multi Purpose Grease. Both with lots of miles between bearing services and no failures.

Whatever you do, don't fall for the EZ-Lube trap and think that pumping a few shots of grease into the grease zerk at the end of the spindle relives you from bearing service, what that usually does is contaminate your brakes with grease. Your hubs do not consume grease, so adding grease doesn't top them off or anything like that. If you have a bearing starting to fail, fresh grease does not "heal" the bearing.

Recommended Wheel Bearing
Lubrication Specifications
Grease
Thickener Type Lithium Complex
Dropping Point 215°C (419°F) Minimum
Consistency NLGI No. 2
Additives EP, Corrosion & Oxidation Inhibitors
Viscosity Index 80 Minimum

Approved Grease Sources
Chem Arrow Arrow 2282
Chevron Texaco Chevron Ulti-Plex Grease EP #2
Texaco Starplex Moly MPGM #2
Citgo Lithoplex MP #2
Lithoplex CM #2
Mystik JT-6 Hi-Temp Grease #2
ConocoPhillips/
76 Lubricants/Kendall
Multiplex RED #2
L427 Super Blu Grease
Dexter Company Lithoplex Red MP #2
Exxon/Mobil Company Ronex, MP
Mobilith AW 2
Mobil I Synthetic Grease
Fuchs Renolit Uniwrl 2
Great Plains Lubricants Lithium Complex EP #2
Oil Center Research
of Oklahoma
Liquid-O-Ring No, 167L
Pennzoil-Quaker State
Company
Synthetic Red Grease
Royal Mfg. Company Royal 98 Lithium Complex EP #2
Shell Gadus S3 V220C
Gadus S5 V220
Rotella Heavy Duty Lithium
Complex #2
Valvoline Valvoline Multi-Purpose GM
Valvoline DuraBlend
Hubs/Drums/Bearings

Yes, there will be a tag on the axle listing the MFG as well as the capacity, SN and other technical tidbits.
In regard to the grease, as long as you clean all of the previous grease out of the bearings you can use either grease as both use tapered roller bearings that are common, no tricky metallurgy there. Even Timken sells grease (specs below) the main point is it follows the basic specs- mainly the temperature, as these hubs will get warm.

Design Attributes:
NLGI GC-LB certified.
Features an NLGI No. 2 lithium-complex thickener that resists softening and provides the mechanical stability required for demanding applications.
Corrosion inhibitors, anti-wear additives, water-resistant additives for extra protection.
Wide operating temperature range -40º F to 300º F (-40º C to 149º C).
55 lbs. rating offers superior load-carrying capability.