“Expansive Growth, Changing Times: 1950s–1970s” examines social work involvement in summer camps during the prosperous postwar years. With social group work achieving acceptance as a method within the profession, camps provided a venue for leading social workers to advance theories of group development, provide principles for staff training and supervision, advocate management standards, and offer insights into youth development. During this vibrant, exciting period, social workers including Olive Crocker, Jack R. Goldberg, Gisela Konopka, William Schwartz, and others contributed to the literature. Camps communicated progressive values supporting social justice, political activism, and racial integration. Their approach was sophisticated and intellectual. Vignettes based on interviews and other sources convey portraits of two renowned camps with social work leadership: Camp Minisink and Camp Wel-Met.