It all varies depending on what kind of wheeling you like, what condition your rig is in.... and how much do you wanna weight it down
Here is a list of things to consider (btw, looks for a thread here called "Tools for the giveaway" or something like that....)
0. First Aid Kit
1. You always needs some food and water: the engergy bars, buy a box and load some up along with some bottled water. You never know when you're going to get stranded...
2. Extra clothes (warm clothes) and a blanket or two, plus any emergency signalling devices you think would be useful (lights, flares, whistles, beacons, chemical lights...)
Now on to tools and other goodies:
3. A nice set of sockets (make sure it's both metric and SAE)
4. wrenches (make sure it's both metric and SAE)
5. breaker bar
6. BFH (just make sure you don't overdo on the B)
7. A showel of sorts
8. Towstrap
9. SPare filter and some spare fluids might come in handy
10. WATER for your RAD!
11. SPare lower Rad hose (upper might be good too)
12. spare belt
13. some extra bolts, nuts, connectors, electrical tape
14. HiLift is a good idea
15. Small (just not too small) bottle jack might come in handy
16. Kit of Plugs
17. Hand Cleaner of sorts (wipes are good
)
18. Leather work gloves
19. Trash bags (big black, heavy duty)
20. Duct tape is a MUST
21. JB Weld
22. protective eye wear
23. GPS, Map, Compass
24. Matches, lighter...
25. Butane soldering iron and some solder and some spare wire
26. Soap (for sealing that gasoline leak)
Ok... that's all that I can think of now