Thank you KSDave, and everyone else. For the above shots, I was using a Sony DSLR-A550 and a Sony SAL18-150mm F3.5-6.3 lens, mounted on a tripod, and triggering with a wired remote shutter release. Manual or Aperture Priority, with shutter speeds ranging from 2 to 10 seconds or so, depending on the conditions. I generally adjust the aperture as needed to get the depth of field necessary and/or pull in as much light as possible for certain scenes. It's tough sometimes to go more than 10 seconds at Disney, just because too many people walk in front of the lens in that time, or especially when set up on the wooden docks for the boat and Tom Sawyer Island, since anyone walking by on the dock vibrates it and will ruin the shot! So the shorter the shutter, the better in those situations unless the park is completely empty.
On some shots, I was using in-camera HDR mode set to +1 or +1.5 - the in-camera HDR mode (high dynamic range) takes two shots and blends them in camera for increased dynamic range - noticeable with the riverboat, haunted mansion, Tiki Room, and Adventureland shots. In-camera HDR is a fairly new feature - Pentax introduced it in one of their cameras requiring the camera to be tripod mounted...Sony upped the game by adding automatic alignment allowing it to be used handheld...I am quite sure this feature will be popping up on a lot of new cameras in the future.
Some advantage was given that it was a very cool night, and quite clear - digital camera sensors like cooler weather as they don't heat up which causes noise and hot pixels.