Flew a Cessna Agtruck on skis hauling fuel (avgas/jet/diesel/or petrol!) in Alaska. Used to load 220 USGal in the hopper on skis - 280 USGal on wheels during summer- and fly out to villages, fishing lodges etc where it was transferred into 44 gallon drums to run generators, snow mobiles etc.
Most winter flights at or below -20C with no heater!!!
Also a set of Cessna 185 wings on the side on a Beaver floatplane, plus IO-520 and prop for same inside the cabin!