And just so you know: last winter in Vancouver we had sustained temperatures of -5 to -10C for 6 weeks straight....and upwards of 5 feet of snow.
Maybe that was a fluke, but they are predicting a similar winter coming up.....sure hope they're wrong :)
I would definitely winterize for your trip. If you're going to stay in your trailer during the trip just use the CG's facilities, otherwise you'll have to de-winterize and then winterize each time.
And yes, mid-November will be in the throws of winter driving conditions over the mountain passes, so make sure you have chains as well.
Or....a nice very-southernly route might be the ticket if you have the time.
