Corey Joe Stewart makes some great bags and horns. He has a couple of shot pouches for sale right now on the ALR forum, there are a couple guys there who have nice upscale haversack style bags for sale that would be good for possibles like fire kits, cordage, gun cleaning kit, compass, lunch, tin cup, and all the other stuff that doesn't go in your shot pouch,,, but you might possibly want.
I have a couple of Corey Joe's horns and recommend his work highly. He advertises on the ALR classifieds but sales go through his Etsy site.