DAE and Maui
I think your chances are good, if you can take the week before or after, and you don't need a two bedroom. Several resorts do show up for Maui online, but most of them are already taken by an OGS so they post as sold. Those that do hit the DAE online site as available rarely last past the Gold Advantage waiting period. Ka'anapali Beach Club seems to be available with some regularity. If you are a Gold Advantage member, your OGS would go to the front of the line.
I am a Gold Advantage member and a few months ago I found a Westin Ka'anapali Beach online for September 2015 and put it on hold for my nephew. It was for his honeymoon, but he could not use it.