In my experience it should take longer than that. A few more days of this, and Hidden will show some signs of rotting, but if it turns around, and has a hard freeze, it will be OK.
Can't say the same for Skilak, but that is a lake of a different color- much more wind and current at the outlet.
What the matter with your snowmachine? I've been dieing to get out on mine but it's been either too cold, too windy, or now, too rainy. Or maybe I'm just too old.
We need to get together Marten. I have a 3-day weekend ahead. I'm hoping for some good weather!