I also went to a "retreat" in Canada. There was 15 of us there. The thing you need to worry about with these is the "crazy" partners.
I see you are looking for in your area, and maybe not as widespread of what I did.
We even had people coming to the US from Australia, and UK.
I have to say though, that in your own local area, not a good idea. Could be too much danger.
amy