When I was attending SIU I did a lot of squirrel and deer hunting at Giant City. I was a beginner turkey hunter and had no luck because I didn't have a clue what I was doing. I would try there now in a heartbeat because they are thick down there. Also if you have access to a boat there is a big lake south of Cdale (can't recall the name but fished it a lot) that is on federal land. I think you need a Shawnee forest access permit or something, but I know guys who would just park the boat on the shore and listen for gobbles. Just remember that there are scads of hunters down there so get as far from the roads as you can and figure out where nobody else is gooing. Good luck!
rw