Since I have done much of the work on our teardrop I have a very complete tool kit. I have one of the security bit sets from Barbour freight which include square drive and the bit I used to fasten the solar panel to the mounts as well as conventional flat and philips, socket and combination set that will fit all of the bolts on the trailer and TV.
Electrical VOM/multimeter seven prong tester for TV plug. I have used a lot of Anderson Power Poles and carry both wire additional connectors and small torch and solder. A full set of fuses, spade, butt connectors... wire stripper/crimper.
The combination wrenches will work with propane flare nut fittings and I carry yellow Teflon tape for gas.
Rope, bungy cords, duct tape,
Torque wrench with lug nut sockets.
Spare LED G4 arrays.