Cold weather camping

I would think it will be ok if no lower than 25 for 4 hrs or so.  It has an element of risk.

On our way back from picking up our pod last March we encountered some winter type weather with temps in the mid 20's and a couple of snow storms. We kept the pod warm with a ceramic heater and didn't have any problems with the pipes. We did have condensation on the inside of the pod. And it did warm up during the day.

Both the fresh water and waste tanks are suspended below the Pod exposed to outside freezing environment. they will freeze up!.  I carry water in 'jerry cans' in the Pod...and heat water on the stove, and use a plastic basin to discard kitchen sink water.  I winter camp in campsites which have
toilets available.  You don't want to haul around frozen water and broken plumbing pipes and valves.
My RV has 'heating wires' on its waste tanks, but even when heated I found that the waste valves tend to freeze up while dumping.
Think of your Pod as a 'heated tent' while winter camping.

Carry a bottle of RV antifreeze with you and when the temps get below freezing pour a little antifreeze in your drains and down your toilet tank.  A "tank" full of water will take several hours to completely freeze "solid".  We spent 3 nights in Yellowstone with below freezing nights and our 15 gal tank never froze.   The inside of our vehicle got down to 40 degrees inside with NO heat other then our body heat....burr it was cold in the AM.  What ever the temp was outside our inside temp was 20 degrees warmer.  We did not have antifreeze with us.  We owned 2 PUP's and we NEVER winterized and NEVER had any problems with pipes freezing.  We didn't know any better and were just lucky I guess.

YEP.  One we owned for 5 years and the other 2 years (both were stored outdoors) before we bought our first travel trailer.  It was then we were told about winterizing the TT.  So like I said, I guess we were just lucky.