I assume you're hunting for Black Bear and I would say no. You do not need one in your stand. If you're that concerned about the Bear, don't go after it with the bow.
Now once you shoot the Bear and go to recover it ,if it was a poor hit, a shotgun with slugs is the norm.
I've hunted Black Bear for years, help bait and see tham all the time while Deer hunting. They are not a threat in the woods to a hunter. It is a different issue in camp grounds and parks where idiots have been feeding them and they have lost their fear of man but I doubt that is the case where you will be hunting.

Either way have a good hunt and learn as much about the game you're hunting as you can from a reliable source before you go afield.