The above link is to the Archive Grid, a new Search site that I've discovered and am exploring with rabid enthusiasm. In a resource like this, you never know what you are going to discover.
You can pick a state and it will list a large number of archive sites and the information you can access there.
For North Carolina, the list includes several university libraries including Duke, Appalachian-The Belk Library, The Charlotte-Mecklenburg Library, Baker and Taylor-which is a music collection, the Mint Museum Library and Archives, North Carolina State Archives, all of the State University Archives, The Outer Banks History Center, The State Library of North Carolina, Salem College, Wake Forest and most locally, Pfeiffer University- The Margaret Fisher Floyd Archives and Collections.
There are so many magical discoveries to be discovered in Archives. The secret is knowing where to look and what to ask for.