I came into a nice used one of these things. Cool little gadget for sure, powers right up and works. What should I expect? Will it work OK without sunlight penetrating through the ice (We have 15 inches of snow on 7-10" of ice. How do I keep the camera where I need it? How do I keep the top flap of the soft case away from the screen? Thanks in advance. It will be a day or two until I can try it out