I have lived in my 5th wheel through very cold winter weather. What we do is, fill our fresh water tank, unhook the city water hose (so they don't freeze and also so the water faucet, etc. doesn't freeze) If hooked up to sewer, we unhook the sewer, so, other than electricity, we boondock our unit. Keeping the inside warm, warms the basement and also our tanks. We have never had problems doing this. Prior to this, years ago, we ended up with frozen tanks, water hoses and water faucets. Also, we have never had a problem with our fridge, which is a two way rv fridge.
Glen and Karen
2013 Eagle Premier 321 RLTS
2008 Ford F350 Lariat 4X4 6.4 Powerstroke
"Hannah" and "Jasper" our tagalong poms