Does anyone else have trouble in the winter with their feet being really cold, even while in a sleeping bag? I've tried wearing the thickest pair of wool socks I can find, but this doesn't seem to be warm enough. I've considered getting some 'toe socks' that look like gloves for the feet, thinking these may be warmer. Now I've just found a pair of Possum Down socks, which are really damn expensive, but may be worth it to keep my feet warm at night. Cold feet tend to keep me awake more than anything else, so this is an important issue. any ideas and experience would be awesome.