Hi Wayne, never booked through the TripleA site, only direct as its easier to apply lower rates if they come out, but use that site to see if any are available, prior to phoning reservations.
Also how long are you planning to stay, if its 1 or 2 nights an AP would probably not be the best as when you count in the cost and what you save on the room. The last few years our best rate has been with the stay more save more but need to stay more than 4 nights, we have not used our AP for any of our bookings, as the stay more has always been better on our dates.