Dog, I see you know about NACK. I was going to suggest them to you to check out. I've met their reps at Paddlesport here in Jersey, and they run a very tight ship, as far as structure and organization is concerned. Our local group, the JSSKA, takes a much different, free-form approach, but we get much the same result--paddlers who become good at boat-handling, rescues, and are very keen and informed about paddling safely. Newcomers rapidly adopt the behavior they see the older members practice: wetsuits, drysuits, PFDs, sprayskirts, etc.