From what I recall, Thanksgiving Day (at MK, Epcot and Hollywood Studios - we park hop) is similarly busy with very lengthy weight times (120 min for Space Mountain etc, even later in the evening). My perspective may be different from other vacationers though as I travel with a child with a disability and have always had a Guest Assistance Card in the past, which admittedly, reduced most of our wait times. I understand that policy has changed though so we shall see how this trip compares.