Popularly known as "The North Bay Hamfest"
The attached photos are from the collection of a member of the Haslett family and are published with their kind permission.
One of the photos contains a pennant with the words: "North Bay, 7th N. Ontario Hamfest, July 1, 1954." According to this account by Gil Frederick VE4AG the hamfest began in Kirkland Lake in 1947, then moved to Sudbury, and then to North Bay. The Northern Ontario Hamfest still exists to the present day, sponsored by the Sudbury ARC.
Sure looks like the gang and their families had some fun.