Low temps ahead

Cut/make a cardboard box near the size of your tank and then make/cut/fold another box that will slide into the first one. No bottom in either box. Then you can telescope it under the tank and tape it.
First have a 40 watt bulb encased in one of those wire protectors inside on a brick. That should keep the tank from freezing.
When traveling, remove tape, separate boxes and fold flat for transporting and you can use it next time. Telescoping will allow you to adjust for different terrain.

Camping on my sons driveway tonight. Supposed to get down to 22F tonight. Got a brooding lamp close to my fresh water tank. Time will tell....

newBera wrote:
Would prefer to have access to water.

Makes good sense. For some reason I was thinking you were storing the vehicle.

One thing I have done when it gets cold is to drain the fresh water tank and use a blue 5 gal. water container that has a spigot. This has been necessary when camping without 110 power.

Would prefer to have access to water.

Why not just drain the tank.

If the bottom of the tank is exposed to the elements It should be heated if liquid is inside during freezing weather. Nothing hot enough to melt or harm tank material.
http://www.ultraheat.com/rv_products.html
Click on how to operateon above.

Here is some good reading also.
http://www.trailerlife.com/trailer-how-to/trailer-tech/cold-weather-rv-camping-guide/

Gene in NE wrote:
Yes.

Yes the lamp? Or yes too hot?

Yes.