Need some advice with cold weather

I am no expert and I am not familiar with the "Arctic" package. However, I have Lance "4 Seasons" TT and my understanding is if I kept my furnace on even a low setting it would circulate around the tanks including grey and black. Then with the water heater on as well you should be safe through those freezing nights. I have never tried to keep my TT available through some freezing nights so I have no first hand experience. Just my thoughts. Maybe someone who has a TT like yours or has been through some cold nights will be responding as well.