Temagami FN will be putting the 5 ton plow on the ice road come Mon. TFN does not flood the road to increase thickness. There was 14" of clear black ice at my hut on Sun. before this cold snap, so I would guess 16" by now. As we all know the ice is not consistantly thick, but I would not fear sledding around the main channels. Saw a full size pickup heading up the NE arm on Sun. Not sure how far up they may have went, but I would guess up to Broom Island, or the Hub.
JTF