just a thought! A Dietz #80 cold blast hurricane lamp puts out 1,400 BTU. If electricity not available, and there is a safe location to hang one or two, as I said in another post. It will take the frost off the pumpkin. It would also control humidity. When I lived on a boat, two kept it warm, one kept it dry. It is low tech, has its negatives but it works. You still can find kerosene at some filling stations.
Open flame dangers not withstanding, don't use kerosene. Get liquid paraffin from a boat chandlery. Might be available other places as well.
Many benefits over kerosene, one being it DOESN'T STINK. Another being if you spill it on wood, it is now waxed, not stripped.

Bruce