OK, so my group is a closed group, which means that someone can search for the group and see who is in it, but not see posts. The next level would require someone to either friend me or someone else in the group in order to get in. Not practical for this purpose, in my opinion. But you are welcome to start your own group and see how that goes? I'm not interested in "owning" any group, so everyone who joins is being made an admin, so they would all have full rights to the group.
So far, I've got four members! Lol.