I would opt for the one that puts the most humidity possible into the
air....also, I'd do what granny did, and keep a cast iron tea kettle on the
wood stove, and refill it as often as needed...
FWIW....you do have central heat, if you have a boiler, or hot water heater, in
a "central" location, and it distributes heat throughout the house, by what
ever means, in your case, by pumping hot water through the baseboards....