as a kid I went to this one time as a friend of the family had a connection via monsanto sponsorship of several attractions. I think the mission to mars was one or people mover..can't recall-about 1976-77 Do not remember if we had to dress up or not. Found out years later that the sultan of brunei was also in attendance that day. I went back years later to the location..just outside pirates ride exit and just wanted to look. The door was open so I went inside. There was no one inside, not even staff. I grabbed a few of the printed napkins with the logo for a memento. Sadly have them no longer as a flooded garage took care of them.
spouse and I were absolutely amazed we were able to open the door and just walk inside and no one came in while we were there for about 5 minutes.