We live in St Charles and keep our Airstream 34 at Woodhaven Lakes. Dwight has provided the link in his post. Woodhaven is 1 hour 20 minutes from our home. All the sites at Woodhaven are privately owned (as deeded sites). An owners association manages the park. Sites cannot be rented out. Woodhaven has seven "lakes" ranging in size from 1/2 acre to 27 acreas. Non water front (vacant) sites sell for $3,500 to $5,000. Water front sites sell much, much higher. The annual association dues is about $1,150 for sites with electric, water, sewer. Electric is metered and paid directly to ComEd. If you have any interest in Woodhaven Lakes, just private message me.
We also have a friend who keeps his Airstream 34 at Lehmans's. It takes us about 35 minutes from St Charles to Lehman's when we visit our friend.
We both are also members of the WBCCI Northern Illinois Unit. There is also a Yogi Bear campground in Millbrook IL and Amboy Il that rent out seasonal sites.
2008 Classic 34
Dodge Ram 2500 Quad Cab CTD
AIR #7317 WBCCI #1772 TAC-IL 1