The biggest groups will monopolize the values. There will be groups though that go with their families for family vacations and will be at every resort including mods and deluxes.
Last year, a lot of the groups had to stay offsite which was a logistical nightmare for the kids, getting them back and forth to games, practice, etc. This year, Pop Warner said that they would not allow this to happen. So, they have blocked off a lot of overflow rooms. I read this all on their message board before it was shut down.
I am at POR and I am sure there will be PW kids there, but I am not too worried. They are away from the resort most of the day. Food court will be swamped in the morning and at night and so will the pool, but I have a feeling all the resorts will be booked solid that week anyway, so I don't think it will matter where you stay, it's going to be crowded.