We just got back, were there during Pop Warner week. It's my 2nd trip during Pop Warner week
First, that has absolutely no impact on crowds or the parks in any way. I can not find 1 single negative to their being there. Yes we saw groups of them around but they were no different than an avg extended family trip you read about here, where 18 people in 1 family are there together.
I am not sure if there was any free dining offered near enough to our dates or not. We didn't need tickets so I didn't even look at the dining offers.
I do know I had no problems with dining reservations. I even made one at Rose and Crown 1 hour out, at 7:30 PM (usually a time those wanting to see Illuminations take). Lines in the parks were very small, as were the crowds. I wouldn't hesitate to go back then