You might have to build one of those bags or buckets that helicopters use to drop water on fires.
Left stick is u/d for boom, l/r for swing, right stick is u/d for the holding line, l/r for the closing line. To hoist a full bucket the right stick goes to the bottom left. If it was a dragline I would have the drag drum be u/d on the left stick and boom as l/r on the right stick.