From your family portrait, it looks as if the picture was taken in the 70's - no later than the 60's. All a long I thought we were in the same age bracket - unless you're the parent of those find young children in the portrait. Where are you from? :-)
This is a picture of my family. I am the kid on the right, My wife on the left and my 4 babies in between. This was taken in the mid 70's. Location was in south central Idaho.