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This movie and the later English film of the same name Alive and Kicking (1996) were made and released only about three years apart. During the early 1970s, when the reunion characters in this movie actually went to Camp Tamakwa in 1972, two other movies of the same "Indian Summer" title were also made and released about three years apart, in 1970 and 1973, they being Bablje ljeto (1970) ("Indian Summer") and Siromashko lyato (1973) ("Indian Summer").
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.