I just registered for the 2012 East Coast Windsurfing Festival at Hecksher State Park on Long Island.
The event centers around informal racing and freestyle competition, but a lot of non-racers go just to sail and SUP around the friendly, warm, flat water venue and to enjoy the camaraderie. There is a lot of talking shop and buying and selling used gear, as well.
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To get a better idea of what the event is like, here are my blog posts about it from last year: