I think it all depends on where you are going. If you plan to go away from civilization very far, then you need to be more self-sufficient. There is a difference between "disconnecting" from a trailer and taking off your truck camper, and different potential problems because of that.
I'm probably lighter than most with a small screw driver/nut driver set, allen key set, eternabond tape. Otherwise, I keep the same stuff in my truck. 12 ton bottle jack, multitool, and tow strap in the truck.