Earlier this year we were there during two big group events (one being cheer). We were offsite so no clue about the resort crowd but the park crowd was much lower than expected. We also found it very easy to get LL and ILL reservations. I don't know if its 100% accurate or not, but we were told large groups are unable to easily book these add-ons because their group based tickets often cant be linked to their
MDE app.
If that is true, it would explain our experience and I would think it would be an ideal time to go to the parks where a big chunk of on property rooms are occupied by those who cant use G+ and are unlikely to utilize early entry and extended hours.