I was down there last friday (13th). It was pretty deep. I just rode the flats trying to stir up some ptarmigan. There were some open leads in the river about 5 miles back. There was also a machine that looked like it tried to waterskip or sunk in unknowing of the water below. It was abandoned when I went by... Haven't been back since then, but I woud imagine its still pretty good. See pic.
I think they had no choice, most people do not carry the equipment to retrieve a sled and let say they did and the people came back they would be accuse of trying to it. Most people don’t have an extra place on there trailer are they going to leave the sled at the road or come back and get it. Let say they did how would they get a hold of the owner?