I was thinking about it the other day and I remembered being at the park till around 2 am. I thought maybe I was wrong, so I asked my mom as this was when I was a kid and she would have been there. She said we did saty that late back when Splash Mt. opened up. We were in line for SM, so that might have had something to do with it.
But did the park used to stay open that late, or was it just because of a new ride and I happened to be in line? I would have sworn that the park used to stay open later then midnight back in the 80s and early 90s.