I think a possibility is Hiawasee, GA. The accees to the dragon is about an hours ride, there is also access to some cool areas in n. ga, like helen, amicoloa falls, unicoi mtn. etc. There is also road atlanta, and the drag strip in commerce which would be about 1.5-2 hr ride from Hiawasee. I really like the idea of moving the higher speed rides to a controlled enviroment, which could be an awesome enviroment to get some vendor support.
My other thought is to stay where it is. Maybe drum up some support from dealers to come out and support the event and track day. I really had a great time, but I think the week should be moved into early may to avoid the rain and colder temps and maybe drop the return to the dragon event. The twice a year thing could be were guys get burnt out.