Gilbert's father is supposed to take Beaver and his pals on a camping trip this weekend, but something comes up and he can't go. Ward can't substitute because he has to work that weekend with out-of-town partners coming in for a meeting. So Beaver and his pals convince Wally to be their chaperone for their camping trip. But this messes up Eddie and Lumpy's plans, since they have a date with a couple of girls that is predicated on Wally being a date for a third girl.
Eddie and Lumpy devise a plan to follow the group up to the campground and scare the little kids so that they'll beg Wally to take them home on Sunday morning, in time to go on the triple date with them. It' s pretty funny with Eddie bringing out a record player and a copy of the children's record "Jimmy and Judy go to the Zoo". He uses it to broadcast wild animal noises to awaken and scare the kids. However, it turns out some of the wild animal noises are real, this ends up rattling Eddie and Lumpy, and they run away. But as they say, pride cometh before a fall. What do I mean by that? Watch and find out.
At one point, during the epilogue, Wally makes the comment to his parents that everybody is on to Eddie except Eddie. June replies that this is rather sad. Wally is growing up - he did great handling Beaver and his friends and the aftermath of Eddie's stunt. Eddie Haskell is still just Eddie Haskell.