I have an old Optimus 00 that I've had for 30 years and just love. It's a big old brass thing, made in Sweden and it burns kerosene. I never had any issues finding fuel or getting it lit in the morning once I learned the technique, using white jelly paste to light it up - it made for a nice morning ritual to get the coffee going. Far more enjoyable than the newer stoves, but it is quite heavy and you occasionally had to clean the burner orifice with a wire tool - took 2 secs. I still use it when car or motorcycle camping just for fun.

I think you're on the right track as far as the lower flammability of kerosene (vs. white gas) and the higher energy it contains. Just find a gallon locally and split it up. Carry two fuel bottles and you should have enough for 10-14 days if you don't waste it.. If you have to restock enroute most hardware or paint supply stores should have it.