Hey Rob, the club I fish is (hope nobody minds if I post a link)
The Jon Boat Fishing Club
I've only been fishing with them since January, plus a few pickup tournaments late last year. On average there are about 12 boats per tourney, and I think I've seen as many as 15. Each boat is a team of 2 fishermen, some people fish alone though, which is fine.
Since joining I've had the chance to fished all over: Mackintosh, Cammack near Burlington; Michie, Holt, Eno River near Durham; Kerr Lake near Henderson; Falls, Beaver Dam and soon Harris in the Raleigh area. I see they've also done Wheeler, Roanoke Rapids and Gaston in recent year.
There is another club or two in the area I've heard of as well. There has been talk of a much bigger tournament with multiple clubs, I'm guessing next year.
Hope that helps, if you want more info, I'd send a message to Dampeoples, he's in charge of the club.