I don't know of any Hobie specific fleets in eastern NC however the Eastern Multihull Sailing Assoc has a great website with links to lots of events. There is a pretty big catamaran scene in the South East with lots of races, and tons of experianced people to help out! I am still really new to it all but got a ride for the Pee Dee classic last spring and was totally welcomed as a newbie and learned a ton. Just a matter of time before I get a boat of my own

http://www.emsa-sailing.org/

Also the Pirates on the Pungo Regatta is coming up and has a multihull class

http://www.piratesonpungo.org/