Here is a link to the Great Allegheny Passage Site.
http://www.atatrail.org/ If you happen to do this pm me ahead of time and your more than welcome to camp in my back yard which is 8 miles from the trail and if Im available during that time I wouldnt mind tagging along for a hundred miles or so.
On second note if you could follow route 40 east from columbus it should be a good ride. I know route 40 in pa is a great ride.