I would want the same things I have at home - de-icer, sand, and salt.
We camp during the winter around here - no big deal. We keep our furnace low (65-55) but keep it running for our heated underbelly. The heat radiating from the tt will melt the ice on it - they really aren't insulated that well. We keep our water tank full - more water takes a lot longer to freeze.
We did figure out that the worst enemy is wind - with or without snow or ice. We were on top of a mountain in 25 mph winds during a snow storm. The wind sucked away any heat making it colder than it really was, forcing the furnace to work harder. A tarp blocking the wind from coming under the tt would have been very useful for conserving heat and protecting our water tanks.