This was always a crane underwriter's no-no here, so had to have operator that would go along, not fresh out of a training film or other dis-course.
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i maintained the 2is1, 1isNone mantra by starting with it, especially in no-no land and operator watching. Also with a safety keeper of sling and carabiner to
Personally favored link/lanyard to ball and actually climbing line in hook or pulley to climbing line as main loaded support, lanyard as slacker backup.
>>Look for best rigging points when over tree, carrying rigging line, many times easier to lace rigging line with crane to point usably near but pulling way from planned TIP.
Arrive at target undo slack lanyard; and lower carcass to premium, not just primary hit position to nest in well to fair scaffolding; maybe lanyard already around tree when stop.