I just rescued some more footage from my family's first trip to Disney World on June 4, 1989. We had been to DisneyLAND many, many times, but this was our first experience at the World. The highlight for me is the moment when we trick my grandmother into riding Big Thunder Mountain. She hated every second of it and still talks about it to this day.
http://www.youtube.com/watch?v=GSi2XeZ5bhs
http://www.youtube.com/watch?v=GSi2XeZ5bhs
Still can't find a video with the opening and closing of the doors...