Probably close enough would be Amboy, there are two there, a Jellystone and Green River Oaks campground.
I personally didn't like GRO much, having stayed there in a PUP, but I know people who were satisfied with it (they were in trailers with full hookups) and it got some o.k. reviews on this site.
If you are in a TT and don't need to use the shower building it's probably o.k. for a short stay?
Otherwise if you don't mind a state park, try Shabbonna Lake near Dekalb. It's about 30 minutes to Naperville, via Rt 30 to I-88 to Naperville, bypassing the little roads that would cute thru Aurora. Some sites have electric, and some are reservable. We like Shabbonna. Their site has map Shabbonna Map
you can click on the site numbers to see pics of the sites.
I would pick Shabbonna over the other two in that area.
I would not pick any of the choices near Joliet, but I may be being a bit of a camping snob....TIFWIW.