Isobel Johnston was a typist when she met Rodolphe Schenk in Melbourne, where they married. She later "taught crafts to the women" on the mission. The mission was made a central 'rationing station' and was visited by anthropologists and researchers including A. P. Elkin, Phyllis Kaberry, J. B. Birdsell and Norman Tindale.
Along with the Chief Protector of Aborigines in Western Australia, these researchers engaged in the assimilation debates of the day. Rev. Schenk's "unsympathetic and fundamentalist interference with traditional practices" - such as infanticide, the ritual drinking of blood ... and in-law avoidance laws - attracted criticism from A. P. Elkin, and resistance from Aboriginal elders. Many Aboriginal children were taken to the mission, which had a children's home and a hospital, and mining- and pastoral-related work was carried out there.
Isobel May Schenk was awarded the BEM on 31 December 1977 for her work in Aboriginal welfare. She died in October 1980 in Albany, WA. The Rev. and Mrs. Schenk had three daughters and a son, who survived their parents: Margaret Morgan, Esther Milnes, Elizabeth Miller and Roderick.