PopWarner fills up the values. And during the day, all of them are at the Sports complex. So there are low crowds at the parks. At night, they get higher attendance (as someone else mentioned) specially in MGM as the older kids preferr those rides over MK.
Now, if you have a Disney Visa, why not compare your pricing with the QXZ package (free dining and maybe discount on the rooms), provided you start your trip 12/14? You would have to call to get numbers though (not bookable online).
This is good to know. We pretty much operate on the opposite schedule from Pop Warner -- we are mostly in MK, and retire to the resort early. Really shouldn't see them much at all.
Unfortunately, I do not have a Disney Visa. I will certainly be looking into getting one, though! Sounds like they offer a great discount. Wish I had done that earlier. Live and learn!