i actually don't keep a gun in the car, but i keep virtually everything else. a full tool kit that just stops short of power tools, extra clothes, water, all the car fluids, a spare tire, a battery-powered air compressor, a dozen or so flashlights, lots of random stuff i'd need in the woods... i could go on... now if i could only keep it organized
that's the advantage of having an 8-seat SUV that's rarely got more than one person in it, i guess. mind you, i've still fit 12 in the darn thing without having to dump any gear. all our friendly police here can just turn a blind eye to that comment, cut me a break and believe me when i say i think i've paid enough in tickets to own my own highway :P