White Oak Campground
From Naperville, take your preferred route to southbound I55 (toward St. Louis); exit onto westbound I80 (toward Iowa); exit on route 178 and turn left (to Utica); drive through downtown Utica (you'll make a zig-zag at the grain elevators to get through downtown); continue on 178 across the bridge; just over the bridge you'll pass Starved Rock State Park on the left, and then see the sign for White Oak on the right.
Alternatively, the ride is very scenic if you take route 71 out of Oswego.
Or you can take I88 to I39 and drive past the giant wind farm (the huge white modern wind mills; only they don't mill, they generate electricity). I39 will hit I80, and you'll go east to route 178.