I always have at least a 22 w/ spare ammo, trauma bag, extra meds, 2 5# ABC fire extinguishers, 20' set of 1/0 jumper cables, tow strap, 20' 3/8" grade 70 chain, 20 ton bottle jack, large welded 4 way, shovel, on board air, set of cross link tire chains with a couple of sets of tighteners...