Mrrzy,Mbo's right — eastern NC isn't a mecca of folk music, but if you swing west on I-40 to Asheville, you'll go nuts trying to figure out who you want to hear most nights. Of course, it's about 400 miles from the coast to Asheville, but it's a beautiful drive.
The other thing to keep in mind about ENC in August is that you're likely to need Scuba gear just to walk around. Hot, muggy — awful.
Don't know the length of or reason for you trip, but if you'd like more info on Western NC, try this clicky
cheers,
david