If you've never been to Bong State Recreation Area - go to just see the park. When Dave and I lived in Illiois we belonged to the club that uses Bong as their training grounds. There is so much to do, camping (tent and motor homes), horse back riding, flying model planes, swimming, volley ball, dirt tracks for dirt bikes, 4 wheelers and in the winter snowmobiles. There are nature trails, people roller blade, model rocket launches. There is so much to do. Whatever you do - do no speed in the part. With a big even think the Grand the rangers will be out in force to give tickets.
Here's a link if you want more information....
http://www.dnr.state.wi.us/org/land/parks/specific/bong/