Our "video" is now up...
And thanks to the convenience and reach of Facebook, I have heard from the woman for whom it was first written as a birthday present at Camp Hitaga during the summer of '69, so that piece of our common understanding has been corroborated! :-)
As Mary remembers it, Carolyn Moore was an exchange student from Brazil who attended college in Arizona and spent that summer at Camp Hitaga in Iowa before returning to Brazil - and she could really play the guitar! Mary and Carolyn were partner counselors in a tent in the Amikanna Unit (for girls going into 4th grade in the fall) the week of Mary's birthday, and Carolyn wrote this song for her out of the blue.
It has been one of our favorites ever since - when I polled the Camp Hitaga Alumni Yahoo Group a couple months ago, May All of Your Dreams (Mary's Song) came in 2nd - but some of the folks voting had been at camp before this was written. Among those of us whose time at camp was since 1969, this song was the clear #1.
We would love to hear more about how widely it has now spread!