These walk in sites check all the boxes. At the western part of the RV loop, is a peninsula of primitive tent camping spots to choose from. About half the sites were filled by the second day we were there. We settled on 62, which is spacious and provides access to the path from the front and behind where you can walk into site 64 as well. A parking area with a single spot for each camp site is well marked and by two vault toilets. Park staff and host were great. A decent fishing spot is just in front of site 64. $8 for IL residents is hard to beat, if you don't need an RV spot with electric. A water source is also by the parking spots. The weekend we were there the weather had cooled some and a great breeze was coming off the lake. Springfield being so close is a bonus.
The only negative is like any spot and how previous people leave the camp looking before you are there. Some garbage in the fire pit and random spots are par for the course in any state park. Pick up the trash and dump it in the dumpster by the parking lot. Leave the site better than you found it is our motto.