We are going to WDW 1/21-1/29. Should I avoid going to parks that have After Hours and Deluxe Extended Evening Hours?
I don’t think either set of hours has in any way impacted crowd behavior.
Parties impact crowd behavior to the opposite of what you are suggesting here. Which is to say if there is a party planned and you’re not going to the party, it’s a good day to visit the park because crowds are typically lower due to earlier closure.
But after hours and Deluxe hours have not seemed to have an effect.