Laurel K. sent the group photo taken at Grandma Cameron's 86th birthday celebration to me. Also sent was a photocopy of the picture that identified (or tentatively identified) persons in the photograph. Aunt Barb assisted by identifying some of the birthday party participants.
Additional information about the Cameron family (including Nancy Cameron, and another photo) see Sandy's webpage here.
Perhaps the Arenac Independent newspaper has an article about Nancy Cameron's birthday celebration listing the attendees.