When a crass new-money tycoon's membership application is turned down at a snooty country club, he retaliates by buying the club and turning it into a tacky amusement park.
Practical Effects
The animatronic gopher somehow got MORE screen time
Production
They built a literal amusement park for this

Director
Allan Arkush
Trivia, insights & behind the scenes
Chevy Chase only agreed to return after the script was rewritten to reduce his role to essentially a cameo. Smart man.
This became the textbook example of unnecessary sequels — so infamous that Bill Murray and Harold Ramis reportedly refused to ever discuss it publicly.