In Alaska there is a special dispensation from the FAA for the securing of external loads on aircraft. In a lot of the remote areas they have no other way of transporting goods which won't fit inside. Quad bikes, boats, in this case meat/food. An interesting fact is that they (the FAA) say that the blunt end should face into the direction of travel. Boats etc are stern into the wind. I'll find a link to the advisory if I can and post it up later.