NC and SC are covered by *3* different SCCA regions. SCR covers Eastern SC, NCR covers Eastern NC and a small chunk of VA, and Central Carolinas Region covers Western NC *and* Western SC. Charlotte, NC and Greenville, SC are both well within CCR's region (as are Clemson, SC and Cherokee, NC for that matter)!
Lest you forget, Knights Stadium and CMP are both in SC as well and both are in CCR's region.
Just because a lot of the members and officers are from the Charlotte area doesn't make it an NC club. In fact there are many in WNC and WSC who aren't SCCA members largely because their own region (i.e. us) doesn't hold any events near them.