You could start by looking at the NCHJA website. There are a ton of shows listed there mostly shows that carry a "C" or draw an equivilent crowd. Some others are the EHA [also a "C" type show] series [most are in Williamston] , McNairs and Finally Farm all have nice "hunter " shows and nice class sheets.
They will also have the date and listings of the "A" ["AA"]shows including the Holiday Classsic.
Hope this helps.
We do the Equine COuntry schooling series down near Jacksonville, Bennett Bunn NCHJA "C" shows, REALLY like going there. THere is a schooling show series just started down below Fayetteville, but I haven't gone there, off top of my head cannot remember the name of it. There are the Johnston County shows but not a big fan of those shows, altho occasionally we do go if we need someplace to get a young horse out. I used to run a schooling show series at my farm, but just didn't draw enough people to make it worthwhile. Triple Creek farm in Benson used to do a nice series but they stopped doing them a few years ago unfortunately.