Nova Scotia sounds great.

I agree with those who say that it is necessary to have the location be near a major airport, to keep flying prices down and make ground travel less problematic. There is a ferry which travels from Portland, Maine to Nova Scotia which, by 2006, will be accessible via commuter train from Boston! So there's a thought. Nova Scotia is rather a long drive and I hear the ferry is great! (you can bring your car on it, too, if you want).

I assume most people will want to do this in summer or fall; I think the Northeast US/Nova Scotia would be the best bet weather-wise.

Autumn is more likely off-season for Nova Scotia. I think we simply need to reserve a hotel to get group rates, and maybe try to find a beach or public park nearby where we could have outdoor barbecues and picnics and sing-arounds...also the hotel should have function rooms that we could have indoor music events in, as well as a room for merchants to sell their CDs, t-shirts, etc. and smaller rooms if anyone wants to hold workshops or specific music events during the week. (I'd guess most people will merely want to socialize and have small song circles so the "organized" events should be kept to a minimum).

those are my thoughts, so far.