I'm not in North Carolina, but Kentucky. We have a lot of the same problems though. Nortons grow well here, they are pretty resistant to the diseases that thrive in humid areas. I do not like Chambourcin wine (just my personal preference, don't want to start a war!). But there are a lot of local wineries that grow it.
2 years ago, I bought some Noirette vines to see how they would do. If anything, they are more vigorous than Norton, although they seem to need more spraying for fungus problems. I like the Noirette profile though, it's a lower acid grape that I hope to use to balance out the high acid Norton. We'll see how that works out when I actually get enough of both to make something.