They must have changed the way things are done since last Christmas. When my wife and I stayed at the French Quarter in December of 2005 we were advised to get our Processional tickets at guest services in the resort lobby ahead of time. (There was a telepone reminder, via the red blinking light, in our room telling us to pick up our event tickets.) I remember that we picked ours up a couple of days before our reservation date. I'd check on that if I were the OP.
I might mention also that we ate at the San Angel Inn that evening, and arrived at the Processional no more than 15 minutes before the event began because I didn't realize how far the San Angel was from the theatre. There was no line, as everyone with reservations was already seated in the front section, and we were ushered right in, and seated on the front row of the second section, on the aisle, which was a wonderful location. I'm not sure that arriving 45 minutes before the event is always such a great idea. LOL.
Enjoy.