We took the Hell's Revenge tour with Moab Tour Co. It is a hair raising rock crawl in a hummer. Worth every minute and every penny. Our guide was great, well informed. We were so impressed with this company that we then rented a 4-wheel drive dune buggy called a Razor. They brought it right to our campsite, gave us a map of the trails in the canyon. We are on a 2 month vacation in our motorhome and so far this has been the highlight thanks to the Moab Tour Co.