We wintered in north central BC last winter where the coldest temp was -20C, or about -4F. Our Wilderness was very good down to -12C or so, but we used lots of propane along with a couple of cube heaters to maintain a comfortable temp. In spite of having a heated water hose, the connection froze just inside the wall of the trailer, but we had filled our onboard tank a few days before, and with heated underbelly, we had no problems.
For a little added protection from the cold, we used skirting and had a 500 watt work light set up which made a big difference in temperature control inside and kept the dump valves from freezing. They are insulated, but you can never have enough insurance.
We kept our grey/black dump valves closed until the tanks were full and dumped as necessary. Never had a problem with discharge hose freezing which could happen if the grey was left open.
I would recommend to anyone who is going to full time in cold weather to invest in a dehumidifier for sure. Keeps the windows clear and helps prevent mildew. Oh and make sure the RV is water tight. Freeze/thaw can do lots of damage.
We have not decided yet whether or not we will winter in our home, or on central Vancouver Island in the RV. Time will tell.
MORLEY is right in that the south coast of BC is fairly temperate. Victoria has the warmest average winter temperatures in Canada, I think, but please don't tell anyone.
