There is a description written on the back of this photo that says it was taken at Lake Vermilion in 1946.  It is a photo of the The Browns, from Left:  Sylvia, Irene, Ronnie, and Marlene.

This picture also has a date stamped on the back, October 23, 1948.  It is the Heikkinen sisters, from Left: Marcy, Judy, and Rosie.

There is no date on this picture but I would imagine it is from around the same time.  Walfred is playing his accordion (out in the snow?) and Carolyn is squinting from the bright sun on the snow.  Remember those lovely zipper boots with the fur cuff??