One of our favorite campgrounds in southern Utah nestled in the Capitol Reef National Park. We visited in mid October, the foliage was beautiful, cool temps at night, mild to warm during the day for hiking. Probably by favorite time to visit Southern Utah, otherwise it would be SO hot.
Like others have mentioned its the perfect mix of historical and geological wonders. The campsite itself is pleasant with flushing toilets, dumpsters, even water refill station and RV dump if you need. All sites are flat. The inner circle of sites are close together but you can find others along the outer edges facing out that are more spacious. All of them butt up to the orchards which you can walk through and pick your own fruit if its the right season. Deer roam around the campground, graze next to your tent or trailer, they are so sweet. The best part (beyond the views of the red rock canyons above, and gentle river that flows next to it) is the Gifford House - they sell fresh baked pies, cinnamon rolls and bread daily! Get there in the Am as they sell out. IF you ask my kids the homeade pies for breakfast might have been their favorite part! LOL.
We just got back from a weekend RV camping at Canyon Rim campground in Flaming Gorge UT. We absolutely LOVED it! Quite, peaceful, well maintained, new fire pits, very clean toilets. A herd of big horn sheep just meander through the site super close but they are non threatening, seem to be used to people, not bothered at all. It was so cool! Sites are well spaced and there are a few that are set back (#10) which is a GEM if you don't want to be near anyone. The Canyon rim trail runs through the CS, just jump on and its about 1 mile to the Red Canyon Visitor Center. It was closed but still gorgeous views. We had an extremely windy day and spent most of the day in the RV, kids wandered around the campsite looking for "cool rocks" which there are ALOT of! I'm guessing it gets quite windy in most areas of Flaming Gorge in general. We'd go back for sure! Temperature was really comfortable between 45 at night and 75/80 during the day.