Looking for sheds at this time of year can cause the animals that havn't dropped yet extra stress as you spook them causing them to burn up vital body reserves. Also if the snow is deep, they will sink into the snow making them impossible to find. I shed hunted for many years when I lived in Manitoba, but I always started as the snow was melted out of the fields and was going/gone out of the bush. They don't all drop at the same time, could all take 3-4 months to come off for deer. Moose should all be off soon. I've heard of guy's making antler traps, but I would never go that route as I would be afraid a buck that's not ready to drop could be entangled in it and starve to death or make him an easy meal for predators.