14 live caribou in a DC-3 on skis from a lake out in the boonies to a nature park. They were tranked and hobbled.
A load of beds in a Beaver on floats in to a fishing camp. The cabin was full of matresses, so the bed frames were strapped onto the canoe strut. There was no room for a seat for the passenger that went in, so he climbed up on the matresses and lay down for the whole flight.
Live lobsters in an Otter on floats. The were loose and I spent half the time kicking the bloody things outta the cockpit.
Max Ward once carried a full sized upright piano strapped to the float of an Otter. He said his touchdown was so smooth there was nary a sour note.