Well-organized and SUPER convenient pick-up from our Airbnb in Williams. Andy was an exemplary guide. He has a background in the sciences and made a balanced, fun, and educational visit (just enough to get the main points, NEVER boring or excessive). He balanced his scientific/historical understanding of the canyon with useful facts about the canyon and life in and around it today. Couldn't ask for a better guide, and I'd do it exactly the same next time! Bravo, Andy!
Oh, and the canyon itself? An otherworldly and humbling experience. On the one hand, it truly felt like being on another planet, but it's just one more amazing corner of these United States. On the other hand, before its size and majesty, your individual size and significance shrink to nothing. If you don't realize how small humanity is in the physical and temporal scale of the world around us, you miss one of the most important points of visiting a space like this.