I have it set so only members can see pictures, and people who are not logged in are unable to see the pictures. This creates an extreme amount of errors on google webmasters/bots, ect. Is there any way to have it so only members, AND bots/crawlers can see the pictures?
You can't (or aren't supposed to) treat bots differently than guests. Google doesn't like that. You might consider setting up a robots.txt file to disallow /attachments . Here is xenforo.com's robots file as an example: