Going to the bathroom on a small boat?
It was cold and windy opening day and I saw a big pontoon boat on the lake. Didn't see anyone on board but, heard voices. Close look and here was a big camoflaged tent-blind set up on the deck with fishing rods poking out the windows. They were comfy, out of the rain and wind. This was a big double bull blind but there are many small pop-up tent blinds on the marked that fold up into a small circle. You can carry them over the shoulder or in a small pack and basically toss one in the air and it opens up into a small tent. Some are like a dome, some are square with removable roof. Grab the flexible frame corners and with a double twist they fold back up into a flat circle. Should work for you shy girls on the ice, shore, or even in a boat.