Every year we read of people who use small propane or kerosene heaters inside an enclosed building.. We read about them in the OBIT section of the newspaper.
So... I do not recommend doing it, Or I know they say it is safe if the unit has a low oxygen sensor (I'd rather not trust it) or if you leave a window open) Likewise) but safer still if you only use a properly vented FURNACE.
Now, as for the propane for the furnace... Most motor homes you either have to drive to the pump or have the pump drive to you .. I did that for a few years. Not all campgrounds have propane delivery however.
On most trailers you can take ONE TANK off and get it refilled while the other keeps you toasty.. and then when the other runs dry swich back to the first and refill the 2nd,, and so on .
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times