We have been living in this house for 2 years. We also experienced very cold temperature in Feb 2021, it was like -15 in the night, we survived!! Since we have our fresh water tank in the house, grey water tank is also in the house, we do not have much problem with the freeze at outside, as long the water station at the campsite has no problem.
We also experienced over voltage from the main electric supply of the campsite, some of our electric appliances damaged, so we have replaced them. We got a new electric stove and dehumidifier with better quality and less noise, which is not that bad 🙂