I've been to Hatteras twice now. The first time was on my roadtrip the boys at Kiteboarding Hatteras were nice enough to let me camp in their parking lot for 10 days. Hatteras is just a crazy place for kiteboarding! It is the land of the Downwinder. The second time I went to Hatteras was in May and I rode with the boys from Real Kiteboarding These guys are all about progression. They had crazy sliders and kickers when I was there and they've since built a dozen more.
Find pictures of both these trips and some ripping riders in Hatteras here