You can buy them at the door correct? They are not limited right… I have my travel all done but have not gotten my ticket yet. Want to make sure i can pick it up at the door since i don't feel like shipping it all the way here.

They don't actually ship you tickets. You just need to check in at the door if you preregister (via an ID or your receipt to prove who you are).

So does that mean you have to pre-register to pick up tickets at the door? Or walk-in tickets are available?