Pop Warner Football tournament is typically the first week of December. From what I have read here on the Dis it does not disturb day crowds too much since they are at their event but it can impact the evening. Also, they tend to stay at the All Star Resorts with overflow to Pop Century and POR. There have been several reports here about the noise. Do a search over on the resort board about Pop Warner and you will find dozens of threads about it.
Since we are staying at POR, we chose to go the week after Thanksgiving so we will be leaving as they are arriving.
Good luck with your choice!