Look into Wayne Fitzgerrell State Park -- a HUGE and nice state park with lake, cafe, and tons of camping. Only 1 loop reservable, all others walk up but again, very nice park. It is on Rend Lake and yes, it is about 60 miles south of Carlyle lake. Nice Winery just outside the park.
There is also Archway RV Park in Mt. Vernon IL. Small, KOA style park -- not my style but closer at 40 miles to Carlyle.
Northtown RV park is straight south of Carlyle on 127, about 33 miles. Looks like a parking lot more than "park", but full hookups.
