Not all of the nearly 60 folk recordings on the Folktunes.org wiki-powered site (hosted on ibiblio) are from NC but a number of them are especially those by Clarance Ashley and Charlie Poole and the North Carolina Ramblers.
These are some of the best rerecordings of the old 78s that I’ve ever heard. If you know more about them you can add to the wiki knowledge base or if you know nothing, you can listen and learn.
The weekend in Eden, NC is the 10th Annual Charlie Poole Music Festival. Go only if you can stand to miss the Carrboro International Poetry Festival.