South Marcum Campground is another great Army Corp of Engineers campground. This one is located on Rend Lake in Southern Illinois near Benton, Illinois.
We traveled here from St. Louis on our way to Louisville.
South Marcum is only one of a few campgrounds around located around Rend Lake. The great thing for me was they are connected via a great cement biking/walking trail that runs about 12 miles around the lake. More of the trail is planned and will eventually take you all the way around the lake. I was able to ride the entire trail twice while we were at the campground.
Site 58 is an electric only site. There's a dump station and fresh water is available. The showers are clean, the park is very well maintained.