I used one of these to break the nuts loose and it works on even over tightened by a impact wrench lug nuts. If the nut is really tight just put this wrench on so you and press down on the handle with your foot to break it loose:
AmazonThe other major tool is a good bottle jack at least a 12 ton, and a piece of 3/4 inch plywood to put under it.
Bottle jack The jack will sink into soft ground and the RV will not go up. For safety sake a jack stand should be used after you jack up the RV. The biggest issue I've had is getting the $#@%% spare tire out from under the RV.
I carried a pancake compressor around to use with my Honda 2K and a impact wrench, but its a lot more trouble than digging that wrench above out and using it. You'll have the wheel off before you'd be done fooling around with the other stuff. This is a case where KISS applies: Keep It Simple S-----
Oh yeah I forgot that we bought this last year:
RampIt works if you have a dual axle and no jack needed tho we still carry one.