I question why you would want to go to Google Group? I can easily add another Forum just for the Nacra 20 Class, where you can officially hold meetings, elect officers, do polls, or whatever.
It can be open so other cat sailors can see the direction of the class, and thereby entice new sailors...,
or I can set it up so it is closed to only paid members. Your Call.

What has Google done for you lately?
And what has Catsailor.com done for you lately?