Question around Cold Temps

While camping I use a heat lamp under the trailer. Clamp close to outside of body, shine at the exposed line from tank to inside camper. If it is windy, I use my TV sunglasses (the thing put reduce sun inside) to slow the wind.
Another hint; That woven looking anti-slide stuff they sell to line cabinets and drawers? Get a roll of that for the floor. Much warmer to step on, thin enough the doors open over it.