I'm also a fan of winter fishing. I've found that the fishing is best later in the day - especially if there is any sun at all to warm things up a bit. (Even a day with the highs below freezing). When nymphing, I like to fish a #12 scud and a #20 midge as a dropper. Some days one or the other will be more productive - other days it's a toss-up. I've also had success with a #20 or 22 midge fished dry.

The solitude you generally have is also a huge plus.......