I'm very interested in adding my Xterra to the herd, however, not sure if I can afford to or not. My question is, what expenses might I run into there? I read on the ECXC site that camping is fine, and I've got no problem throwing a mattress in my truck for a few days, and bringing a big cooler for food/beer. I know registration is 30 bucks, but what other expenses might I run into (excluding gas)?