All I can say is "wow"! Colin was our awesome guide-a wealth of knowledge, and very, very informative, conscientious, fun-loving, and made the tour so awesome!! AND, he is AWESOME at handling the 4-wheeling!! We were all blown away by the surroundings, and vastness of the desert. Colin explained about so many of the plants around, as well as other desert creatures. He talked about the geography-can't believe his knowledge. We were a group of 4, and all walked away thinking this was one of the best tours we'd ever taken. Thanks so much Big Wheel Tours!