Illinois state parks are hit or miss as far as how nice they are. The older ones tend to be in need of some upkeep. I stayed at Lake Le-Aqu-na a few weeks ago and they will be shut down next year for repairs. Rock Cut near Rockford is pretty nice. I was at Illini and starved rock this weekend. Illini is small and tight for many bigger trailers. Starved rock is nicer and just 15 miles down the road. Depending on how far you want to drive if you are sightseeing near Springfield I stayed at the Army Corps of engineering Frank Bo woods campground about an huor form Springfiled Il. Full hookups. Most illinois state parks are electric only.