Propane

Use your furnace.

A little more info about the camper/trailer/RV you're staying in would help.

what type of heater are you thinking of

many of use an Olympic Catalytic heater

2oldman wrote:
Use your furnace.

X2. To many issues about using small heaters.

Is the furnace broken?
Furnace does circulate heat best for keeping pipes from freezing.

Nothing better than the comfort of consistent heat from a digital thermostat and the house furnace. I tried a buddy heater and it messed up our sinus. I have had people tell me that the wave is cleaner burning. Life is too short and burning more propane puts shoes on kids feet of the workers who come behind us. Some people get a company to bring in 100 pound bottles. I just had a 120 GALLON upright tank delivered to our house. They fill it to 100 gallons

do not use an unvented combustion heater.

Plan on renting a 100 gallon propane tank.

I'm not convinced of the safety of small propane heaters.

Any unvented heater is going to produce carbon monoxide. Very dangerous inside. Also raises the issue of not providing heat to the areas where plumbing is. Frozen pipes in the winter really sucks.

I love my Big Buddy heater. Just keep a vent open a little.