Some more thoughts...
When I first started crawling after my Bushman tracker (this is on all fours and then down to total belly crawling) I had trouble moving as fast as they did. It wasn't the physical condition that was the problem, it was how to hold my bow. Now, I will admit that this little Bushman guy, named Go, was a "Lizzard" in the bush. He was also 65 years old. He had also been doing this stuff for at least 63 years.
At one point he demanded my bow. I was reluctant to give it to him, but I did, and off went went at close to light speed. He held it by the arrows in the Great Northern quiver. Next time out, I did the same and it worked great. So this answers Tamure's question. You hold it by the arrows and slide it in front of you.
Walking...I ALWAYS walk toe-heel. If you stalk heel first and feel a twig or stone under your foot, you are committed. Put your foot down TOE FIRST! This way, as you are lowering your weight slowly to your heel, you can stop the weight transfer instantly, should you feel something noisy under your foot.
BAREFOOT: I go barefoot virtually all my life. Thanks to some skin grafts on my feet, I have serious problems wearing shoes. Some I can wear, some I can't. If snakes and thorns are not too much of a problem, I will make the final stalk barefoot. My feet are almost as leathery as the Bushmen's are. There is little on this earth as quiet as a human predator in bare feet. It helps slow you down, too.
I'll think of some more stuff and jump in with it soon.
Too Short