Unfortunately there is a reason why the humber marsh says no skating or winter sports allowed on the ice, it's just not safe, the ice fails to get thick enough, but if your feeling risky bring emergency ice picks, and for added safety, find a large tree close to the water's edge, get a 100 ft rope and tie it off, then walk it out to your spot. With this method, if you fall in, the worst case scenario is your cold and frozen. Without the picks and rope, best case scenario would be being alive because trying to get out of a hole surrounded by thin ice with only your hands and body weight is a very scary thing, the ice you attempt to lift yourself up onto, just keeps breaking more and more Cold water's a bitch, never forget that.