Just be aware, you will be asked for your VALID AP when you check in. They will enter the AP barcode number prior to allowing you to check in to the hotel at that rate...
That hasn't been the experience of most people (or actually anyone who has posted on the subject). They will allow you time to go over and get it. From other people's experience (not mine).
Same here as far as AP goes. I have only had to show it to the desk before check out day, it has never had to be valid upon check in!
Andrea