I survey my rig and take what I need to deal with most things. I have properly sized sockets and ratchets to change a tire or drum and bearing on the side of the road, the right size socket for the water heater, 10" adjustable for propane fittings and other stuff. 1/4" and 5/16" nut drivers for appliances and hose clamps. #2 Robertson,#2 phillips, 3/16" and 1/4" slotted screwdrivers. 10" Channellock and 6" needle nose with cutter. Utility knife, electrical and gorilla tape. Add plenty of nitrile gloves and that's about it.