UM,... if you are lucky, yhe uhaul would get to musser resovoir, but to go beyond that would be near impossible. I wouldn't recommend the Riley Dacite pits in a uhaul. you could drive to musser res and go by bicycle from there. Be very careful- glass buttes is an unforgiving landscape with no water, bad roads, snakes, ticks, rednecks, and worse. If you do happen to get stuck out there please contact me- I know people in the local area. I will PM you my contact info.