Who would like to help plan out a Trans NC route/race? I'm based in Raleigh, and want to make a trip from here to the TN/NC mountain border. That would cover half of the state.... and would be about 350 miles :D It's a long state.
I'm not sure that I can help much, but I'm interested in some long off road NC routes. I'd be interested in seeing what you come up with. I've dreamed about linking up an off road route that roughly runs a parallel route to the Blue Ridege Parkway, or something similiar, but don't have the knowledge of trails much north of the Asheville area. I'm pretty good in the Buncombe, Henderson, Transylvania areas though.
Mountain to Sea Trail
You should read up on the Mountain to Sea trail. Some areas are bikeable. It might help with your logistics.
You might post this on http://www.sorba.org/ . A guy over there mapped out the Trans North Georgia route he might have some ideas.