There's a lot of good advice here. Make sure your rig's in good condition, with good tires, a good spare with tire-changing tools that work. In case of a breakdown, plan to stay for a while, maybe overnight, or walk out. Water, some non-perishable food, hat, sunglasses, walking shoes, extra clothes for a trail-side repair, radio (if you've got one), a couple of flashlights w/batteries. I carry wrenches for the metric tool sizes Suzuki commonly uses (8, 10 12, 14mm). I once had a throttle cable break on me in Death Valley. We idled out just before sunset. Get an experienced 4WD friend to go with you. Tell someone where you're going and when you plan to return.