I carry mine by the grip and usually upside down(string facing down). I find that this puts less fatigue on my hand. I use to carry mine by the string, but it seems to bother the creases of my bare fingers quickly, if i am wearing gloves no problem. If I am stalking, walking a lot, setting up a stand, carrying extra gear, etc I use a sling. This is the ulitimate if you have a long walk or are glassing for spot n' stalk.

I have never worried much about a quick shot opp with the bow, while I have stubbled upon deer while walking in, I just don' t see it as a possibilty with a bow that is unnocked, etc. If still hunting or expect a deer to be near in an area, I carry it nocked and ready.