Here is the registration info; I'm posting it here because it took me a moment to find, as there is no link from the USACK page:
http://www.nrcrhinos.com/events.htm
USACK Nationals, October 1&2, Nantahala River
Moderators: kenneth, sbroam, TheKrikkitWars, Mike W., Sir Adam, KNeal, PAC, adamin