I live in Northern VA an I go to Summit Point in West VA quite a bit. It's a little over an hour's drive from the DC area. If you're in NC, VIR in Danville VA or CMP (Carolina Motorsports Park) in SC is probably closer for you. As for signing up, I usually go with NASA. SCCA goes there too, CarGuys, and I would gues BMWCCA probably visits those places as well.