My grandparents owned a lodge in Haliburton (cottage country north of Toronto) from 1950 until the early 1970s. Friday night was movie night. They would rent films and screen them in the main lodge for the guests. I think they were 16mm prints; I can't imagine they got 35mm copies. I just recall that the films came in multiple canisters.
The screening of NxNW circa 1964-65 is burned into my memory banks, mostly because of the impact the film had on my 7 or 8-year-old psyche – I'd never seen anything that imaginative –– but also because the film kept breaking every 15 minutes, usually right in the middle of a tense scene.