Added to that, every time I moved cold air seemed to rush inside the sleeping bag (or the air I had warmed with my body rushed out, either way, brrrr) made the night really miserable, even with 3 layers of clothing on.
A good mummy bag would definitely solve that particular issue. When its cold out I find its best to cinch the hood up nice & tight, leaving only a breathing hole. This keeps most of that nice warm air inside the bag where we want it!
Something like this:
