I dont believe a mile of winching....think urban legend as well. Only way to do a few hundred feet is to have it exit off spool after a few wraps to maintain friction so it never builds up to fill drum. With that cost and weight for the mile of line...would be better and likely cheaper to borrow an ATV if permitted or someones pack horse to get it out. 
Better planning, field dressing, or cutting down into manageable sizes and carrying out with packframe. Or dont shoot that far back in the bush if not willing to put in the work.
Plus...I have dragged a deer 200 yards through swamp and fields...and it tears the crap out of the deer with fur and hide worn through.....just not wise choice unless you have one of the slippery plastic drag wraps.
Plan better...field dress...or quarter and pack out in pack frame setup.
Better planning, field dressing, or cutting down into manageable sizes and carrying out with packframe. Or dont shoot that far back in the bush if not willing to put in the work.
Plus...I have dragged a deer 200 yards through swamp and fields...and it tears the crap out of the deer with fur and hide worn through.....just not wise choice unless you have one of the slippery plastic drag wraps.
Plan better...field dress...or quarter and pack out in pack frame setup.
