Hi yellowamc,
Welcome to the Heartland Owners Forum.
There's winter in Florida or south Texas, and there's WINTER in North Dakota. The answer depends a lot on where you plan to winter.
In general, there are 2 aspects to winter camping: 1) keeping the interior at a comfortable temperature, 2) keeping the water running. In extreme cold, the water is usually the tougher problem.
Take a look at our owner-written
Water Systems Winter Usage Guide. It'll help you with keeping the water running.