When doing maintenance work on your RV even at home, use the tools that you carry when traveling. If you are unable to do the work you may want to reconsider what tools you carry when traveling.
I carry a complete 235 piece tool kit along with a 20 ton bottle jack, 1/2" drive torque wrench, 19.2v Craftsman 1/2" drive drill, multimeter, grease gun etc. Not near as much as the shop but it will work in most cases.