As winter approaches and cold weather temperatures lower, I'm always constantly thinking about my vans water supply freezing and batteries getting cold.

I do have an espar diesel, all the plumbing is confined to the interior of the van, and batteries have heaters (just not tested and proven). And the van is fairly insulated.

What do you guys recommend and what do you do to take precautions during the colder months and snow days?

I really want to go play in the snow this year.