RE: Carrying a bow on horseback?
Bob,
Yes alot of our bowhunters show up with bow slings. I can't remember the make or model of the slings. Its just the occasional one or two. I don't much care for the bow scabbard case that goes on the saddle we have some and bows are always getting bumped on trees. When I travel on horseback on my personal hunts I just one hand it on to the horse and then I slip my arm in between the riser and the string and let it hang off to one side of my body. This is okay as long as your not going on long trips on horse back.
If you have a hard case I would have him pack that in with the bow to base camp atleast you would have a nice safe place to store your bow while in camp.
Also make sure you can secure your arrows really well on horseback. Wouldn't want a arrow to come loose from the quiver and cut you or your bow string.