I remember Mission to Mars. I loved it as an 8 year-old. I also remember loving Alien Encounter as a teen or young adult. It was never meant for young children and I seem to recall warning signs that so many parents ignored. Sitting in the dark, strapped to your seat while the sounds of alien footsteps come closer and closer. Suddenly, there was a breath of air at your neck. That’s when the screams really kicked in. Of course, you missed the full effect if you had long hair!!
Oh, yes, I do remember poor Skippy, too!