Using camper off-grid in winter

Noob here, and in a bit of a panic.   I just purchased my first camper, a 2012 R-Pod 177 this last Friday (10/25/2024).  I didn't even think of these questions until sitting in the camper that night and watching some YouTube videos on R-Pods.

The big question is, how do I protect my camper from the effects of freezing temperatures when my intention is to be using it in the freezing temperatures? To make matters worse, I'll primarily be using it off-grid three or four days at a time, and most of my trips will be impromptu.  I'm hoping I didn't just buy something that I can't use as intended.

Although we live in southern Missouri, we do get hard freezes.  Sometimes even in October.  I have watched a couple of videos on winterizing my R-Pod.  Even just putting antifreeze in the tanks and lines seems impractical, since I may pull it out of storage just a few days later to go use it.  I could use it without any of the water features, but that's not what I bought it for.  I want to use the toilet, and have hot water for showers and doing dishes while I'm camping.

So, what do I do to keep my lines and tanks from freezing both while camping in freezing weather and when in storage?  (And hopefully it doesn't cost a lot. I spent most of what I have to spend on buying the camper.)

Thanks in advance,

Andrew