
I got a bit surprised seeing Sixshot's toy on a scene from the movie, specifically, when both Candy and Aykroyd began to argue in the cabin, one of Candy's kids is playing with a Sixshot toy.
the movie was shot in October, 1987 and released on june, 1988,for more info:
http://en.wikipedia.org/wiki/The_Great_Outdoors_%281988_film%29
