In freezing temperatures, it's important to keep the water filter warm to make sure the inside of it doesn't freeze and crack. In addition, electronics (batteries and cell phones in particular) don't do especially well in cold temperatures. What's the best way to deal with these in the hammock? Maybe there's an easy solution, though it's occurred to me that a small pouch sewed underneath the hammock would be ideal for keeping such items inside the insulation without risking rolling on top of it in the middle of the night.