Hoping that someone who's been on the Southwest Splendours (Sayhello??) can answer a question for me. We are going on the July 4 with myself, DH and DS15...Do you know if there is anywhere we would be able to rent ATV's at the Grand Canyon?? I know we have a couple of free afternoons, and my DH and I would love to do this with our son...also, if you know if there are age restrictions on being able to drive one. Thanks in advance...Kristen