The budget for this movie was so small that there was not much money for additional music. That's why the theme song is played multiple times.
The roller coaster the girls go on is "Thunderhawk." It is the last remaining wooden roller coaster at Dorney Park.
Milton Berle's performance as the 'Director' is a parody of John Ford, with the eye patch, the sunglasses, and the style of hat, as well as the fact that he is directing a western movie.
The producers wanted Hayley Mills to play the now-grown-up Mary Clancy as Sister George, but she turned them down. This led to the casting of Stella Stevens (who was 29) as Sister George.
While Sister Celestine enters the "Pirates Cove" ride at Dorney Park to separate the boys and girls, two goats are led across the screen with blankets that have "Where Angels Go" and "Trouble Follows" written on them.