If you want to be sure and have the pass in hand when you arrive at the park and ready to enter early in the morning, I would go to teh kiosk at DTD the night before and get your pass. That way you can head right for the turnstiles in the morning. If you aren't going right away or aren't concerned about a little time, you can do it at guest relations outside any park. It will take a few minutes of standing in line, and then you will need to head to the turnstiles after that. Be sure everyone in your party has a gov. issued ID with them too. You will all need to be present at the purchase, not just one person.