Coffee Grinder wrote:
My tanks are heated and was curious how much protection that actually provided. While camping to avoid freezing up. We have not winter camped  and plan to always be hooked up. I would imagine the heater is a pretty good drain on propane however. Will plan on  using electric heat inside. Any suggestions will heip
It is a wide range depending on what source of heat you actually have.  Most RVs are good to 25 while in use.  Heated with the furnace might be good to 20 maybe even 15 but you should be looking for an actual rating at this point or tread carefully.  If you have electric heat pads the tanks should be good a bit lower but you still may have issues with the piping and drains.  If the high for the day is less than 32 everything is suspect.  Sometimes you just need to get out and see.  Just have an exit plan and keep your propane topped off by checking daily.