Magic Kingdom is usually up by the end of the first week in November, except for the Christmas tree which doesn't go up until after the Christmas Parade taping. Animal Kingdom and Hollywood have their decorations up in early November. Epcot has minimal decorations; from a couple years ago, it seemed that their Christmas Tree was the last tree up (other than MK). Have never seen the resorts fully decorated as we always left by November 11 every year. We normally go from around Oct 30 (to see both Halloween and Christmas) until Nov 10 or 11.