I had a wonderful time at this park! I stayed in backpack site 3. There is a mix of lakeshore, forest and prairie here. When I visited there were no garbage receptacles at the picnic area and the restrooms were closed (I think likely because it's after labor day) but the vault toilets were fine, and I did find dumpsters at the main campground. If you're doing the hiking club trail, it's a longer one compared to most of the other parks so be prepared for that. I did a few sections of it and never did find the password (it must be in one of the parts I didn't get to). The trails are mostly flat and wide. There are portions that overlap with a bike trail. The signs are adequate to get around without having to have a map in hand or on your phone.
The backpacking sites are a ways from the campground but not too far. 1 and 2 are closer, but spaced out from each other, and 3, 4 and 5 are on the outer edge of the park right off the lake (I believe you can also paddle in, at least there was a portage sign in site 3). Make sure to get water before proceeding to the backpacking sites. The only downside to my site was that I could hear highway noise. I think 1+2 are farther away from the road.
The bird watching in the fall is incredible. I saw or heard over 30 species of birds, including 2 kinds of owls at night. If you visit the backpack sites you'll be treated to hundreds of pelicans, ducks, geese, herons, and other waterfowl.