Great trip - lots of sun and hiking - only a brief morning of cloudy weather. We really like the resort in Phoenix - we'd go back there. The one in Tucson was great too, but Phoenix was really nice.
Flight back was no problem, and the car situation straightened itself out nicely. I'd be careful using FOX rentals, unless the person has a lot of time to wait. We got a Rogue which worked well throughout the trip - drove about 400 miles total.
We are now thinking of Canada and wondering about the COVID-19 stuff. I'm not sure (no one is really) what to do and we'd only make reservations if they were insured against any voluntary or non-voluntary travel restrictions.