I had an extra day last November and found a night at Pop Century for $85 on Travelocity. I thought that was great since Disney will never let you book for that short of a stay directly on their website (at least I have never had any luck!).
So we got to see the resort, walked over to Art of Animation and saw that (we had never seen it before and were very impressed). Overall it worked out great. (and it was very close to Disney

)