NAVTEC picked us up as promised at the hotel at 8am. Our guide, John, was absolutely fantastic and patient through the whole trip. He was extremely knowledgable and skilled about off-road driving, local knowledge, geology, the plantlife, history of the area, as well as the different government agencies that managed and controled the US Park system. He had a great sense of humor too. The trails and roads he took us on where fantastic and exciting! I would highly recommend John and NAVTEC Expeditions as a guide to anyone.