As far as I know, it's just random. Whoever is next in the stack is who you get.
As for AP's and SP's, you just get a regular ticket. Except it has the info on the back and your name. They give you a little booklet to put it in which gives you passholder details.
I was hoping that they'd be plastic but no. Sadly not. Though my SP held up just fine and we used it every other weekend at least for the year.
-m