It looks as though members of the Major family — with various friends and relatives — are ready to head home after a vacation at Otisco Lake, perhaps in 1917. That's Rose McLaughlin Major, hands on hips, at the far left, and her husband,, John W. Major, at the far right. Their youngest daughter, Irene, is fifth from the left. Their eldest daughter, Margaret ("Maggie") is second from the right. It's possible the person to her left is her sister, Viola ("Lola"), though her outfit makes her look like an older woman. (It's the smile that makes me think it might be Lola.)
Behind Maggie is her brother, Billy. The young woman to Billy's right may be Elizabeth Radford, his eventual wife. That thing above her is not part of her hat, but part of the roof on the camp behind them. Stanley "Buster" Major, another son of Rose and John, is the young man with his arm on the shoulder of the fellow in front of him.
Unfortunately, I do not know the others in the photograph, whether they are friends or relatives, and, if they are relatives, whether they are from the McLaughlin or Major sides of the family.