I went to post something tonight, and then decided I didn't want it in Google or necessarily want just everyone tripping over it out of the blue, so I'm going to try something Iv'e done with other forums.
I've started a Members Only Board. I changed the Member Groups so that you don't get your first "bean" until after your fifth post. Once you get a bean - you can access the Member's Board.
Google doesn't crawl it, so anything you say won't be indexed, and pictures won't show up in image search.
Try to use it sparingly. I'm going to police it a little bit. I've had problems in the past when I've done this about members just gravitating to it as the defacto board. We want to be ambassadors for preparedness here, though, so let's keep as much of what we do as possible in the light of day.
And remember - even though Google or random passersby can't see it, there's no real "security".