To avoid the heat, we don't go into the parks in the summer until after 5 pm (we have APs) so we are really missing the late night hours (been here since Aug 5th). With HEA at 9pm at MK, there isn't much time for rides after the fireworks. Getting out of MK is also a real chore with the early closings as the crowds don't have the time to dissipate (seems like many stay through 10pm). The line for the monorail and ferry were longer than I have ever seem them this past Saturday night. They brought in buses to get people back to the TTC - haven't seen that before.