IL Beach SP in Zion, IL has a good number of sites with electric hookups, and some with electric & water - the latter more of a paved parking lot. It's along one of the commuter rail lines to the city, which is quite handy. Chicago Northwest KOA in Union, IL is near I-90, northwest of the city, probably at least an hour out driving (more in heavy traffic). Chain o' Lakes SP has two loops with electric hookups; the newer & nicer (with nicer bathhouse) is Fox Den CG. This park is near Fox Lake, which is the terminus of another of the commuter rail lines into the city. Driving, probably 70-80 minutes into Chicago in good traffic. There is virtually nothing any closer in.
We have been to all these CGs, many multiple times to Chain o' Lakes, since this was our old home area. Any will do, but if you're staying for 9 days, you'll need to be careful with water usage or else be prepared to hitch up & drive to the dump station midway during your stay (or more often), or have a portable waste tank to haul to the dump station. You can get FHUs at the KOA.
Sorry, we have never heard of the CG you mentioned. Another private CG near Fox Lake is Fish Lake Beach, but it seemed cramped and is popular with seasonals. We weren't impressed.
Wherever you stay, advance reservations are a MUST. All of them fill up most weekends.
