Thanks everyone for your helpful comments. I am in St George, Utah and it was well into the 90's today....hard to believe I'm even asking the question! We are doing about 7 hours a day...Brigham City tomorrow, then over the Monida Pass to Dillon, MT, then Lethbridge, AB, then home to Edmonchuk My main worry is freezing up the pipes...so if the RV is warmed up once we stop, it sounds like I should be OK, but if in doubt I`ll open the low point drains as suggested.
I am heading north to Alberta after wintering in AZ. It looks like I will hit some -10C overnight temps. I'd rather not winterize the unit and I don't like the idea of towing with the heater on. Is the Polar Bear package enough insulation to prevent freezing of my waterlines etc.?
Hi there, there is another way to avoid crossing of the continental divide in and out of Butte. You could take I15 south from Great Falls through the Big Belt mtns which are not that big really, you have superb views of the Missouri R. as it winds through the mountains. If you want some superb fly fishing for trout you could stop in the mtns, Prewett Creek is a good RV site, and float to or from the small town of Craig...good fly shops there will set you up.
Since you are heading for Billings, at Helena I would take the US287 south to the I90 at Three Forks, it's a two-way road but not much traffic and no big hills.
The other reply suggests another way from Great Falls which I'm sure is good advice...I am going that way in reverse on Sept 5, from Big Timber.
I tow a 39ft fiver with a Ford F350 and even the Butte hills are no problem...so, lots of choices, the fishing always makes my decision for me! Good luck.