I know it's been said, but for anyone getting antsy/nervous about Saturday and wanting to buddy-up with a group for help, I recommend checking out the various Comic-Con FB pages. I think I'm a member of at least 3 of them. There seem to by a myriad of people looking to form groups (likely quite a bit more informal that the groups through here): if you're a daring, trusting type it might be an option.
Also remember that it's all about "collecting codes." If can find even four or five friends w/codes to join up with, you've got yourself a group. For years I had great success procuring badges utilizing three codes from my family + two additional codes from friends. A larger group betters the odds, but every additional friend/code betters your odds.
Good luck, everyone!