Are you perhaps referring to the Smoky Mountain Recumbent Rally, May 17-20, 2012? It's being discussed at RecumbentRiders.com (former ROCKET Riders) right now. (No, I'm not planning on going.)
Details seem to be:
May 17-20, 2012
Location: Townsend TN
Organized by Edge Recumbents and U MAN POWER Recumbent Bicycle Shop
Registration at
http://www.active.com/cycling/townse...-2012?int=29-6