Was living in Miles City, Montana at the time of his marriage to Martha Jo. The marriage license was issued October 26, 1935. The wedding (on November 2, 1935) was witnessed by Mary V. Dangaard and William Dangaard Jr., and officiated by Rev. Frank P. Loewen.

By the 1940 census, the family (now including 2 year Donald Jr.) was living in Custer, Montana. Donald Sr. is listed as a Mechanic for State highway machinery.