I agree that you should book your home resort right now, and then try to change to a different resort at the 7 month window if there is anything available for a different resort of your choice. There will likely not be much available at VWL or BCV, but if you can't get either of those, you will still have your lovely SSR home to stay at.
We LOVE early December, and usually alternate doing early December with doing early January every year. Last year it was early December, and this year it was early January, and will also be early December! Just love those early December decorations, holiday shows and lower crowds!