Hey, Challenge,
What part of Ohio are you in.
Wife and I just bought a Mad River Adventure 14 canoe to play around with on some of the local lakes and streams. We've been out to Caesar's Creek Lake, but with all the rain we've been having, we're really not ready to try the rivers yet. They seem a bit high and fast still.
If you are in the southwest, you can get maps for the Mad, Great Miami and Stillwater Rivers showing all the launch sites, dams and portages from way north of Dayton down to Cincinnati at:
http://www.miamiconservancy.org/resources/maps.aspThey will mail out free copies.