It is hot at the lower elevations this time of year. If at low elevations I would go for a campground with electricity to run the AC. However if you can stay above 6000 ft it will be a lot cooler. We camp near Jacob lake north of the Grand Canyon in summer. I think they just release fire restrictions and no permit required to have a fire in the kaibab. If you want to camp in that area and you have a toad park the rv and go scout for a site that you feel comfortable with. There is a lot of boondocking in that area. Zion, monument valley and Moab will be hot and I would look for hookups in those areas. If you hold off until mid September the nights will be cooler in the lower elevations. Of course at that time of year you could be running heat or AC, all depends on what the weather does. If you have not been on lake Powell I strongly suggest you do a tour boat ride, it is beautiful back in the canyons, something you cannot see from the shore.
