If you're back packing nothing beats a folding saw. There's no need to split wood, the saw can split a pelvis, you'll be carrying a knife anyway for shikking. Axes aren't exactly quiet so if you're trying to remain undetected while hunting....well you get the picture. Axes-especially small ones are responsible for a lot of trips to the hospital!! If you can't have a handle long enough on an ax to use both hands it's a danger to you and everyone else within your reach. A saw is safer, lighter, quieter and will also do damned near anything a knife and ax put together can do.
the chef