Johnson was very active with clubs and organizations in Hadley, Massachusetts. He participated in the Hadley Men's Club with blind poet Clarence Hawkes and was an elected Democratic delegate of Hadley for several years. Johnson was also closely involved with the town schools. In 1930 Johnson and his brother Henry R. had a barn on the Porter-Phelps-Huntington property moved to the center of Hadley to house the new Hadley Farm Museum.
Johnson continued to write and photograph through the mid-1930s. His last book was Sailing for Gold, published in 1938, two years before his death.
He died on January 22, 1940 in a Brattleboro, Vermont hospital.