My vote would be for you to winterize. We will be towing our fiver to Osoyoos, BC in early November and I fully intend on winterizing the RV just for the one day that it will take to get to our winter RV resort. It would be truly foolhardy to gamble on the weather in the Canadian winter. The weather can and will change without warning and you have to expect unscheduled layovers and staying in a hotel/motel if roads and mountain passes are closed. As always, YMMV. Good luck and please post up your travels as you cross the country.
Cheers!
Mike
