The water temps are about 70. The day time temps were around 100ish night times 70ish. There is no day hiking allowed, only overnighters with permits. We went slow, had a mishap with one of our group, and with a dip and play time in the first set of falls, it took us from 5:00am - 11:30 to get to the big falls. The Havasupai Falls is 9 miles in. You could park a moho at the trailhead, if it was small, not much room there either, but someone did have a small Rent RV. Yep only foot traffic and mules.. They do have a lodge and for $85 one way you can get flown in on helicopter.. but going back out, you have to put your name on a list for the ride out and locals get priority.
Thank you everyone.