The Corps of Engineers campgrounds at Rend Lake are very well kept and a safe bet for a weekend away. Showers are clean, bathrooms all “flush”.
Campsite sizes vary, but all are reasonably spaced.
I visited Fox Ridge frequently as a student of nearby Eastern Illinois University, but never camped there. We came back to visit campus and stayed in site #12 at Fox Ridge.
All sites were spacious and shaded. We did not use any of the facilities but were impressed with how secluded our campsite felt. Each site is Isolated by trees and growth and the entire camoground is shaded.
There are plenty of trails in the park and things to do in the area. Be sure to check out the Worlds Fastest Soda Machine in Lerna, IL!
We stayed in site #7 for one night in the spring. Some sites are spacious, others are pretty cramped. The loop that we stayed on was close to the water with views of Carlyle Lake.
There is a swimming pool and campground store. The pool was closed when we were there but looked nice.
Only complaint that I have was the potable water supply. I filled by trailer’s tank at the drinking water supply when you enter the campground. It was extremely dirty with a lot of copper colored solids. I drained the tank and filled with a spicket next to our site and had the same dirty water. Not sure if this was related to it being early in the season but was not impressed at all.