Blasphemy..
You will end up getting banned around here suggesting that one might by chance be able to camp with out propane :W
We use very little propane, we do have a residential fridge conversion so no propane use there..
Water heater is used mainly for washing dishes so not much used there..
Do ALL of our cooking OUTSIDE (charcoal cooking tastes much better than stove or oven cooked food) and when the grill can't be used, it is electric skillet to the rescue so no propane used there..
Furnace, well, we are fair weather campers, absolutely no way do I care for making it a habit to camp in temps below 60 degrees.. Only have had to run the furnace every few years when the night temps drop into the 50s due to crazy spring nights so not much propane used there..
Have had the current trailer for 11 yrs and have only had to fill ONE 30 lb tank..
Has cost me a whole $18 in propane for 11 yrs of camping :B