I have pictures of my outdoor thermometer here in Edmonton showing -50F, and it has been colder than that. It gets even colder further nort.
Between work, I had branches in Yellowknife, Inuvik, and Iqaluit, High Level, LaCrete, Ft. Vermilion, Hay River and a bunch more, that reported to me and that I travelled to regularly. Add to that hunting, fishing and just exploring we covered a ton of truly remote places. You will see a lot of really remote country even in the near north. From Edmonton north, across all of the provinces stretching east west, plus the old NWT lands and the Yukon there are less than 400,000 people. That is an area bigger than the continenetal U.S.A. The old NWT, which is the current NWT and Inuvik, has less than 75,000 people and 40,000 of those are in one city, Yellowknife.
In addition, there are large stretchs along the mountains and the Alberta, Sakatchewan borders that are very sparsely populated too.
Most anywhere more than 100 miles from Edmonton or Calgary is a bad place to break down. Until you travel these areas it is quite hard to envision just how far it can be even between occupied houses, let alone towns.