We stayed here over Labor Day 2002, the second day after they opened. Boy did they need to get their act together! The golf course, spa, and at least two of the restaurants were not open. The pools were freezing.
Having said all this, the lobby, public areas and rooms are beautiful. It will be a great getaway this spring and summer.
There is not much to do outside the resort so I think two-three nights would be more than enough.