there are a bunch here in wisconsin, but i think that 3 hours would limit your ability to play good ones. if you go 4 or 5 there are a ton of very very high quality ones. check out; wild apple or justin trails or north wood co park maybe brown deer? (dont know if they have camping) or farther north, quite a bit farther there is sandy point or highbridge hills and telemark.
If you don't mind driving a bit further, I would definitly reccomend Ludington, Michigan, or Mason Coutny Campgroud. You have Beauty, Beast, Golliath, Leviathan, and Flip City is a short drive down the freeway. What a beautiful place to camp and disc golf.
Go to Iowa City/North Liberty Iowa. Sugarbottom Campgrounds is right next to Sugarbottom DGC. This is right on the Coralville Reservoir with fishing, swimming beach and mountain biking trails. On the other side of the reservoir, you could camp at West Overlook campground. It also has a great beach and the Turkey Creek Disc golf course is right next door. There are also several other courses in the Iowa City/Cedar Rapids area that you could play while you are there, including Peninsula course, Jones Park and Legion Park.
Not done yet, there is also camping at Lake MacBride just north of the res. There is also a nice beach, fishing and boat rentals. However, the nearby disc golf course has wooden targets. Fun yet different! (Double check on this course, it may no longer exist.)
There are also many courses to play on the way there and home including several in the Quad Cities, Geneseo, IL and Sterling, IL.
According to mapquest, Iowa City is 200 miles from Chicago, so if you drive at least 65 mph, you should make it in three hours.
i agree ray if he did go into Michigan then up by flip city is a nice area, but if he went to Kalamazoo area he could do some camping near cold brook, and go to the courses in battle creek area along with Meyer Broadway in three rivers, then oshtemo and Robert Morris, but he would have to avoid knollwood unless he doesn't mind a easy course to play.