I believe in bigger crankbaits this time of year anyways. A couple of years ago I caught what felt like the normal 3 - 4 lbs northern. As I was playing it to the boat, all of the sudden it felt like a monster fish. I could hardly make any headway with it. After a bit, all of the sudden it was back to the 4 pounder. I got it into the boat and something had inhaled it to just behind the gills. Some pretty impressive teeth marks. The biggest I've caught out of our lake is 10 pounds... I wonder though if there is something bigger in there...