This is the only time that Pamela Baird and Cindy Carol, playing Mary Ellen Rogers and Alma Hanson, respectively, appear together in the series.
The lake/beach location is actually the same one used in the previous episode, Beaver Becomes a Hero (1960).
Look closely and you will see the canoe that Beaver rescued, making him the hero.
"Friend's Lake" is spelled with an apostrophe, as seen on beach signs and Wally's shirt.
Although normally billed as Ken Osmond, the actor who played "Eddie Haskell" was credited as Kenneth Osmond in this episode.