Harrington Lake Diefenbaker suggested that he needed a quiet place to go fishing, not too far from Ottawa. Later that year, Harrington Lake was chosen as the site for an official country residence and the buildings were formally designated as a secure residence for Canada’s prime ministers. During the first prime ministership of Pierre Trudeau, his then-wife, Margaret, added a vegetable garden; according to Kim Campbell's autobiography "Time and Chance", the garden still provided the house with fresh produce at the time of that writing. Campbell was the only Prime Minister to have spent her entire term in office residing at Harrington
Gatineau Park to create a park around his Kingsmere property and ease access to it by building a parkway. Though he denied the charge, the criticism would shape King's subsequent decisions regarding the park. It would take another eleven years for the park to be created in embryonic form on July 1, 1938, as a result of efforts by Percy Sparks of the Federal Woodlands Preservation League. By choosing to create the park through gradual property acquisition, the King government allowed private property to continue existing in Gatineau Park—a situation that has prevented the park from becoming a national park. Today, the