Horror director Sam Raimi, who plays the character Stick Coder also attended this camp (Camp Tamakwa) as a child.
Where Bill Paxton looks at Alan Arkin's collar and it says Lou Handler, that was actually the real founders shirt
The characters of Matt and Brad are based on the two Michigan-born founders of the Canadian clothing company "Roots". In real life, they actually attended Camp Tamakwa, which is a real camp in Ontario's Algonquin park, which is where the film was shot.
The movie was filmed at writer-director Mike Binder's actual child-hood summer camp, Camp Tamakwa in Ontario, Canada.
Ashley Williams, who plays Ida Heinken in the flashback scenes, is the younger sister of Kimberly Williams-Paisley, who plays Gwen.