How crowded are the parks on Fathers Day?

[DisneyFanatik]

Just made ressies for June. We are arriving on 6/19 - hoping to do early entry for MK on Sunday 6/20 (Fathers Day). Does anyone have any info about crowds from past experience?
Thanks

 

[Dan Murphy]

Not sure from personal experience, but sure seems like it would be.......Sunday, summer, EE, MK, holiday. Maybe someone will be able to add a personal observation.