This is a small but well maintained campground at the south end of the reservoir. We stayed here one night while traveling the scenic route north from Bryce Canyon National Park to route I-70. I'm not sure I would recommend the route for very large rigs due to several sharp turns. Our site was right by the road but it wasn't a busy or loud road.
It was a bit buggy when we visited in October and there was a random loose dog from a nearby farm that almost attacked our dog. My advice would be to keep your pets close. Utah uses Reserve America for booking, but online booking needs to be 48 hours (?) in advance. They do have a self pay kiosk at the park entrance if you are looking for something same day.
The campsites are rather close together and positioned around the edge of a very large parking lot. We're guessing that during the busy season there will be a lot of boat trailers in the parking lot. There is also another section of the campground that was filled with class A motorhomes that might have been longer term campers.
The bathrooms had free showers, but I believe they were locked since we stayed in the off season. There is a dump station and garbage dumpsters.
This looks like a great place to stay if you have a boat or like to fish. We didn't find any obvious hiking or biking trails, but we were just passing through.
There isn't a lot to do at the park or nearby. If you are planning on staying at the park make sure you bring supplies with you.