So, I made one cheesy workaround. It's not ideal from a realistic physics perspective, but it's workable from a casual game effect.
In the crane, I have 4 long visible steel ropes from the top winch to the load platform. I also have an invisible secondary lower object that follows the top winch but positioned much closer to the load platform, and 4 short invisible rubber ropes to basically strangle the sway from the load platform. With a little more tuning, this might work pretty well for my purposes.
In the crane, I have 4 long visible steel ropes from the top winch to the load platform. I also have an invisible secondary lower object that follows the top winch but positioned much closer to the load platform, and 4 short invisible rubber ropes to basically strangle the sway from the load platform. With a little more tuning, this might work pretty well for my purposes.