jimbo98 wrote:
Running the fridge and heater at night, it will last about a week.
Hmmmm .... that doesn't sound right. On our three long 7000+ mile cross-country RV trips we of course had to run our refrigerator almost constantly and the furnace nights, as needed, from our Itasca's 18 gallon (about 14.4 actual gallons of propane when filled to 80%) propane tank. Our furnace cycles all night, coming on maybe three times per hour and only for a few minutes each cycle.
The soonest we have had to refill our propane tank was in about 3 weeks of use like the above, and even then it accepted only around 8 gallons of propane.
One week from an 18 gallon tank must be what's necessary when camping without hookups in freezing temperatures for most of each day. :h