And my opinion is, I think you would be much better off with no link from my site to your group. My site has so much info that debunks the blood type diet (Eat Right 4 your type.. sure..) that cranks and trolls might locate you from a link and go ruin your new place.
The idea of inviting people you know or even want there will be much better than letting them all come in and "free for all" you. Maybe even have to have entry approved by the moderator like you suggest Lynne.