yes - I've done that - such a good time of year. I arrived on 28 October and stayed until 10 Nov. In 2011, Christmas began Tuesday of the 2nd week of Nov. so there was about a 5 day gap between finishing all the Halloween parties and slowly removing things till there was nothing then suddenly you wake up with tinsel everywhere! Not all the Christmas decorations go up so early - they do a very good job, but hotels are not really done, the gingerbread things are not built, the MK Christmas tree does not go up until after they film the Christmas Day Parade in the first week of December (OOOO Today!)
You'll also catch the last week of the Food and Wine Festival.
And the first show of the Osbourne lights and
MVMCP, last few shows of
MNSSHP.
The fort Fiends were still in halloween mode
In 2012 I went early Dec and there were far more christmas decorations and all the Epcot santas / candlelight processional / gingerbread things etc were fully underway. I enjoyed both visits!
weather is fantastic
great time to go - DO IT!