Free: Contests & Raffles.
Personal opinion, YMMV. In order of importance:1. 4WD. Not negotiable.2. Real tires. By that I mean LT, not passenger. Good tread. If you don't have good tires, please don't bother us and ask for assistance.3. Locking differential. Nice, but not as necessary. You can get by without it. Just have the good sense to not get yourself into a situation where you can't escape without it, or limited slip. (I have both, seldom need either.)If you have 4WD and good tires, the next thing would be the portable kit (spade, tow strap, chain saw...).