When I visited let me start out by saying there were a lot of signs saying day use only. However when I looked more closely I realized that the areas by the dam are day use only and this small camping area is available seasonally. All reservations are done through the state's pay line and can be easily done however if you are struggling I was told you can also stop at the Corp site for some guidance (office just at entrance).
This are is a great and more quiet option for camping as opposed to the much more busy state park just across the dam. Limited sites and no direct water access to the lake, but this side in my option was a bit more chill and if you are interested in fishing would be a much better option.
Sites varied in size with my van easily fitting in a pull in site and I noticed a couple which could accommodate a larger RV. Amenities were pretty basic with tables, lantern hooks, grills and a water spigots located at each site. Restrooms were no frills and shared with the parking area which was filled with those fishing from the bank. I also noticed there were a few hook ups, although when I visited they did not appear to be functioning.
I really enjoyed the overlook just as you turn into the park, a nice view of the dam site and lake as a whole, though the services are no longer remaining, they do have a picnic structure.
All in all, I would stay here again!