Like the others have said, just check in with your name and PS# with the CMs to the left side of the gates, holding clip boards(at least thats what they had last year).
See if you can scope out the old fashioned firetruck parked at the beginning of Main St. We were lucky enough to be asked by the driver if we were going to the Castle. Since we were he told up to hop on and gave us a ride right down Main St. It was very cool!