We stayed here this past fall as part of a visit to Springfield, IL to visit family and drive to Iowa. We have family in Springfield, so haven't ever had a reason to "camp" there, but made this place our first spot.
It was great. The owners were super helpful, they literally showed us to our spot (even though this is a big campground) and were available for any questions or needs.
Also - this is right off I-55, so it was very easy in/out with a large 5th wheel, which is always a plus!