Just as a side note, and to concure with TomD, we never haul out pigs from the woods whole, we always carry a packframe, game bag, and plenty rope. We will in the field skin, and bone out whole pig with the exception being the ribs for barbeque (Pulehu), so external parasites are pretty much a mute point, though the main reason for butchering in the field is less to carry back, and less work on getting back home including disposing of guts, skin, and bones.