Based on the book The Hermit of Gully Lake: The Life and Times of Willard Kitchener MacDonal, by Joan Baxter, is the 2007 film titled Willard: The Hermit of Gully Lake, produced by APL Films, directed by Amy Goldberg, and narrated by Randy Bachman.
Description (from the film): “In the 1940’s American-born Willard MacDonald jumped his troop train heading to WWII. Fearing authorities he lived as a hermit deep in the northern wilderness of Nova Scotia, Canada for more than 60 years inspiring folklore for generations.” Trailer on Vimeo.