>>983573Soot/smoke is a result of an inefficient fire. Stove design and fuel quality are what determine that, not specifically "size" per se.
>>983579Propane is 21,600BTU per pound.
Seasoned Wood (20% moisture) is 7,100BTU per pound.
This week the US national average cost of propane is $2.39 per gallon (4.2lbs). A 20lbs tank is 4.7 gallons which would cost $11.23 (fucking $25 where I live if you have a tank to trade in too, otherwise it is $70!)
Cost of twigs: free
20lbs tank of propane is: 432,000BTU
20lbs of twigs is: 142,000BTU and takes up a lot more space than a 20lbs propane tank, but thankfully the twigs are stored in the woods.
I'd probably use a rocket stove and keep a small box of twigs, in the car, for getting twigs sourced from poor weather conditions going. I'd have a small backup propane stove with a tiny tank too. I mean car camping right?