We (DH, Dsister, and I) went to MK at night March 3rd, I believe the park was open until 1:00am, and we stayed until the park closed. We had fast passes made for 8-11, in between our fast passes we were able to get on rides that were less popular. We spent 8pm-10:30pm in Fantasyland/Tomorrow Land jumping to Space Mountain, Little Mermaid, Winnie the Pooh, Small World, Speedway, Monsters Inc, People Mover, and Buzz. Between 10:30 and closing we spent riding big thunder (multiple times), POTC, HM, and watched part of the electrical parade. Other time was spent shopping and eating. All in all, it was perfect. Lines were maybe at 10-15 minutes depending on the ride. The temperature was also perfect. Jeans and a t-shirt seemed to be the norm for my traveling group.