Figure out what tools are necessary to change a tire, buy them at Sears (Craftsman brand are the best going for the money, Kobalt from Lowes is good too.) A small jack, socket, extension, ratchet. Look or ask for 1/2" drive.
A tire pressure gauge that goes higher than the rated pressure of your tires.
Buy a 2X8X10 and cut it into one foot lengths. You should end up with 10 planks, great for stacking under stabilizers, or for leveling, whatever.
I bought Ziploc plates and bowls, which are out of production, but basically get a quality set of plastic plates, bowls, glasses, etc. I'm sure Tupperware has something. They are durable, have served me well for over 10 years now and clean up easily.
A set of decent silverware to leave in it.
Spices to leave in it, salt, pepper, favorite season all. Store in Ziploc bags to keep them dry. Nothing edible or sweet can be left out in the camper. You'll exceed your GVWR with ants.
I carry a small pump sprayer with ant poison, everything that touches the ground, around the tires, jacks, stabilizers, power cord and water hose all get a healthy dose of it. Ants, or other insects, won't cross that line and invade during a campout. Use something biodegradeable of course.
Collapsible camp chairs, something to poke a fire with, small hatchet to splinter up wood for kindling.
That enough for now?