A lot of good suggestions and tools/parts and wire ends and extra bulbs etc. I have been RVing since 1974 and always bring a LOT of tools and spare parts. One thing i have found to be very valuable is a medium size tool box that i have loaded with fasteners, screws/bolts/mics sized nuts/washer (locking and flat) some bailing wire and misc. small parts i just might need.
I enjoy helping other RVers on the road or in a CG. For that reason i carry probably more than i need.
And a word of advice. Was leaving a CG in Californina years ago and there was an RV that had cut a corner short and had a pretty good sized tree limb sticking through the broken window. He had been there for about an half an hour and was totally lost as to how he was going to get free of the tree.
He didn't have a saw or an ax so i helped him out with the saw i ALWAYS carry. A hack saw and a carpenter saw do add to the inventory but when needed they are most valuable.
Happy motoring with God's blessing.
Gizmo.