Running through the BC passes in winter can be a **** shoot. If the weather forecasts are for bad weather then best to not do it. If the forecast is for cold dry weather you would be fine. We traveled from Vancouver to Edmonton in our M/H once and it was snowing through the passes. It was not a fun trip. When we got into Alberta the temp. dropped to -20. The plumbing in our coach was fine but the dump valves froze solid.
There are a lot of folks that head south for the winter and travel through Nov. through Jan. Most would be winterized.
