A couple days ago, I had CR at AP rate (199/night water-view) for 3/29-4/2 but opted for DTD Doubletree on 3/29 and 2 rms at ASMu 3/30-4/2. I am still trying to get 3/29 so we don't have to move, though. Tough because I have to get 2 rms. I cancelled my CR ressie yesterday morning, so somebody must have grabbed it up right away.
All I can say is, keep trying! I even tried to book 3/29 at the regular rate, then I could keep calling to see if an AP rate cancelled (then they could switch my rate for me) but they are booked up. Earlier in Easter week, though, was booked up first -- that is how I ended up with late in Easter week.
Good luck!
Beth