We also did the will call thing. We arrived on 3/22 planning to start using the AP on 3/23.
Watch the activation date they give you. I thought it would not start until its first use. However, when we picked it up it was activated on 3/22....We hadn't planned on going in the day we arrived just to get settled...I wasn't about to argue over one day. Plus 12 months from that day puts me at Easter 2008 which is after we planned on being there.
It's definately the way to go. We got 10 days in the park with it so far. Plan to go again in December and also the week before Easter 2008. I figure we'll get 24 days in the parks over the 12 month span.