1.
Ice chest or cooler, get one that will best fit your vehicle.
Don't forget that much of the inside space will be taken up by the ice, I like to freeze water or juice before leaving and use that for the first few days instead of ice.
Blocks last longer than cubes or crushed.
2.
Tent don't skimp here, get a good one and know how to put it up and stake it down properly.
Practice before leaving home.
3.
Extra tent pegs, stakes, and rope.
4.
Hatched with hammer back to drive stakes.
5.
Bedding or sleeping bags.
See other articles for more info.
6.
Air bed, mattress, or sleeping pad.
Not necessary, but will keep you warmer and more comfortable.
If funds are extremely tight you can live without.
7.
Ground cloth or tarp, inexpensive and will prolong the life of your tent and keep you warmer and drier.
8.
Lantern and flashlight.
I prefer a battery operated lantern, but if you like propane go for it.
9.
Basic First Aid Kit.
10.
Briquettes.
If you plan to cook over a fire, don't plan on gathering fire wood, or even bringing your own.
Gathering is prohibited in many places and bringing your own is often no longer an option because of hitch hiking pests.
Option: Portable propane camping stove.
They last for years and years, don't take up much space and give you more options in meal planning, however they can be expensive.
11.
Garbage bags.
Leave no trace, pack in pack out.
They can be used as a makeshift poncho as well, or for dirty clothing.
You can even use free grocery bags.