Chris went on a sailing adventure into Svalbard and the North Sea. It was remarkably cold and stormy. Camera batteries tend to die quickly in cold weather, so you want to be sure you have backups and keep them warm in your pockets. Cold weather can cause some condensation on your camera when you go from the cold outdoors to the warmer indoors. So you when you come in, you'll want to let the camera sit and warm up before using it. Chris also brought a shower cap, which you can use to protect your camera and it doesn't take up any space. And a cheap microfiber cloth is great for wiping down your gear because they are super absorbent and they dry quickly.