It really depends on what type of hunting you do. If you backpack into the wilderness to go after big game and only have what you carry on your back, you might go with something light that could still do "bigger" chores. For example, a Scrapper 5. When paired witha baton, you can do quite a bit.

If you are closer to a base camp, you could carry a smaller knife for cleaning/dressing out your animal and leave a bigger blade at camp for camp chores.

I guess "hunting" knife needs to be followed up with your intended purpose. If you are going to be killing a hog with it, you may want a knife like a regulator. If you are using it for cleaning animals you'd need a different type.