Gather a variety of sockets, combo wrenches and hex key wrenches. Also include a combo cutting plier, a water pump plier, extension bar, flex ratchet handle, spark plug socket, spinner handle, a regular screwdriver and a Phillips head screwdriver.
Remember to set aside a flashlight and utility knife. Both come in handy in case of emergencies.
Pack all the tools into a case. Dig around for an old toolbox large enough for the tools, or buy a new one. Pick something strong and durable.
Load an air compressor and roadside flares into the RV. It's also a good idea to carry a polarity checker for testing electrical outlets at campgrounds.
Consider an All Purpose RV Camping Tool. It serves seven functions and encompasses a bottle opener, hatchet edge, hammer and wrench. There's also a compass in the handle.