When visiting Springfield, Sangchris Lake State Park. My brother thought it was nice. If cold and windy stay in the section away from the lake.
Turkey Run State Park, north of Terre Haute, IN, best hiking trails!, all ranked by difficulty, lodge, covered bridges, golf course nearby, stream to float. The covered bridge fest in area towns, vendors, etc. It is in October.
Warren Dunes State Park, MI, beautiful area on the Lake, dunes, beach.
Carlyle Lake, IL, Eldon Hazlet SP is wooded, the other COE parks are more groomed, golf course near, bike trail, popular sailboat lake, The Keys in Keysport, IL has good food, bands.
Lake Shelbyville, we like the COE campgrounds, the State Parks need some care, nice lake to rent a pontoon boat, shops in Shelbyville, nice Visitor Center, balloon fest in October.
Garden of the Gods, Cave in Rock SP, Giant City SP all south of Marion, IL beautiful area, hiking
Pere Marquette State Park, the park, beautiful lodge, hiking, quaint town of Grafton, IL (google it) really busy on the weekends, wineries, bars, shops, river cruises, Aeries Winery (best view!!), The Loading Dock (dine by the river, bands, flea market 4th weekend of the month), always something going on in Grafton, free ferry to beautiful Calhoun County hilly (peaches,apples), pay ferry to Missouri go to St. Charles old town area, shops, restaurants, bars, gambling boat,Lewis & Clark history.