How long will your tours be? If you need to buy fuel along the way (most likely if touring more than a week or so) ease of restocking will be one of the biggest factors.

Regular unleaded gas is available just about anywhere you go, but a hassle to dispense into your stove or fuel bottle. You can likely drain enough to top up from the hoses on the pumps of a gas station that is not open.

White gas is most often only available in gallons in the places I have seen it while on tour in the rural US. No way I want to haul a gallon of fuel.

Kerosene seems like it would be less available.

Diesel will probably work in the stove, but will smoke and soot up the pots more. It is pretty available. But a hassle to dispense like gasoline.