For my dad's 80th, we took the family (11 of us) on a private, group tour with NICK. It was a lot of fun and everyone in the group enjoyed it. Nick was for sure the best part of the tour--his narrative and energy were interesting, fun, and respectful of this beautiful place and its people. We learned a ton from Nick--even the half of us who have lived in the Sonoran Desert for quite awhile. For the half who weren't as familiar with the area, they came away with a new appreciation for the desert. Highly recommended.
COVID-19 note: our jeep was open-air (with a roll bar and cover), and Nick was in a separate area for the driver. Our group was already "maskless" (in our own family bubble), and this was effectively an "outdoor" tour, so it felt completely safe.