Found these guys thanks to a Groupon they'd been offering and it was so much fun! Shuttle from the strip if you're an out-of-towner, great group of guys running the tour. They start with one-on-one training on how to use the ATVs, which doesn't take too long. Then split into 2 groups which take the course at different paces. The experienced group is pure thrill ride, tons of fun. The leader of the beginner group is great about going at the speed the group is comfortable with. Plenty of water breaks, decent box lunch provided, too. Highly recommended!