I carry a ton of gear in a backback in my truck and also carry straps, chains, extra rope, jumper cables, fire extinguisher, and a whole lot more in the truck outside of the backpack. One thing (maybe the only thing <img src="/images/graemlins/smile.gif" alt="" />) I don't carry is extra fuel. Just seems to be more dangerous than it's worth. At least that was my thinking when I drove a car. In a truck, in the bed, properly secured, I might consider it, however, at this point I carry no extra fuel. What I do carry is a hand-pumped syphon hose though.