These are pretty decent sites. You just pull off the road, set up and enjoy the camping experience. 
We hiked down to the gorge and also enjoyed the dispersed camping available right along the riverside, which was pretty cool but... that hike back up is a DOOZY especially with a pack on. I would recommend it. The payoff of the views is highly worth any trail difficulties. 
This was a really clean, well respected area. I liked to see that most other campers were clearly doing their part to Leave no Trace.