This experience confirmed my long-held belief that the expense of a guided tour maximizes the time and the experience of the vacation. Our affable and knowledgeable guide provided us with a wide variety of scenic, geological, and historical experiences that would have taken us days to research for ourselves. I left the park [reluctantly] with a sense that I had sampled the best it had to offer. The two-way radio communication between cars worked splendidly and easily. I would strongly recommend this tour as a magnificent orientation to the Park, regardless of whether you are a short-term or long-term visitor.