I've used the fuel oil/kesosene thing and if my wife hadn't woken up we may have all died.
I highly recommend against it. We did make an error, but still. I recommend against it.
Stinky oily PITA!

What ever you do, don't get a Buddy Heater.... totally unreliable at altitude.
A Mr. Heater single burner will chase you right out of there and don't forget the Carbon Monoxide alarm.