If you're going to be doing the 500+ miles Illinois portion of the Mississippi River trail, these maps are your friends. They can't get much easier as they point out everything, campgrounds, motels, bike repair along with phone numbers and such with excellent milage calculations and it's free. Have a great ride.

http://www.bikelib.org/mrt/index.htm

http://www.bikelib.org/mrt/booklet.pdf