In the early 1930s, Susan attended what was known as the Farm Camp, a camp for kids under 12 located on the Long Reach of the Saint John River, downstream from present-day Yip's Cidery. The camp, run by the McKeen sisters, consisted of sleeping tents, a house where meals were served, and an old barn that served as the playhouse. Older boys stayed in a log cabin later owned by Colin B. Mackay.
Susan Mackay loved the Farm Camp so much as a young girl that when her father came to pick her up, she refused to get out of the water. She stayed right there until he drove back to Rothesay, only returning sometime later in the summer to finally take her home. Years later, she would return to the Farm Camp to visit Gordon Fairweather and her cousin Colin B. Mackay to enjoy days swimming in the river, evenings by a beach bonfire, and dinners on the deck of Colin's log cabin. Yip Mackay, Hope Mackay (Hunter), Stit Mackay (Inches), Janet Mackay (Hart), and Mary Ives Anglin (Mackay) were also part of these cherished summer gatherings.