If I were driving in Canada during winter conditions, I would have the means to get along comfortably for at least 24 hours, if not longer, including food water, and some means of cooking. In fact, right now, with the stuff in my vehicle here in sunny southern California, I could easily get along for at least two days- food (some of which is non cook) water, alcohol stove, sleeping bag, and first aid gear. They are always in the vehicle.

Don't depend on anyone else to be there when you are inconvenienced. You are bound to be disappointed.