Our TT tools that stay in the trailer
Set of wrenches and sockets, allen keys
Screwdrivers
Pliers
Punch
Hammer
Extra pins for hitch set up, small pins for jacks
Duct tape, electrical tester and wiring bits and pieces
12V cordless drill and charger 2 batteries various screws for inside and out
Various plumbing bits
Extra light bulbs for inside and outside, fuses
Lubricant and sealer
Grease gun
I am sure I have forgotten some things we have. We carry the same on our boat and in the truck.