I won't bore you with all the details but I will remind you that early registration does have it's rewards.
For one thing, you won't have to worry about whether you did it anymore. And you won't have to worry about the lengthy on-site registration process the day of the fest. You can just walk in, be handed your pre-printed name badges and issued a door prize ticket.
It's so simple when you're pre-registered... Much easier than the lengthy written test and annoying physical exam on the day of the fest.