I parked my car at NOC and got a shuttle to Russell Bridge from Jeff Hoch at the Hike Inn.
http://thehikeinn.netfirms.com/
Some of the trailheads along the way are pretty remote, and could be okay, or not. You could scout out parking options at some of the churches I saw on the roadwalk section. Or, Franklin lies about halfway along the route. Lots of parking there. Maybe the North Carolina Bartram Trail Association could assist you.
http://www.ncbartramtrail.org/
They just put out an excellent map this year, if you don't already have it. Enjoy your hike - it's a great trail!
CG