In this episode, it is revealed that Alice took psychology at school - which she flunked.
Barry Williams (Greg), Christopher Knight (Peter), and Susan Olsen (Cindy) provided an audio commentary for this episode on the Season 1 DVD.
This is actor Christopher Knight's self-proclaimed "favorite episode".
This is the first mention of the Bradys' favorite camp site, Mt. Claymore. However, it is the only time they are seen there. It is mentioned two more times in the episodes What Goes Up... and Our Son, the Man.
It's generally accepted that the word "sex" is never said on The Brady Bunch until the last episode, but Greg says it in this one, though in a completely different context