Get a sling and use it for walking up and down the mountains.However,I have to strongly advise against using one on a horse.I own horses and I know what can happen when they spook.If that happens,the last thing you want is an object with several sharp edges flopping around,hitting you and the horse,especially if you're in the timber.If that horse starts to spook,you want to worry about controllingthe horse,not your bow.Use the sling for walking but get something more secure for for riding.Besides,a scabbord would make a nice partial tip to your guide at the end of your hunt.

There's a good chance the guide will have decent stock and you won't have much to worry about but you never know.I was in Colorado on a pack in hunt back in 2003.The outfitter just bought a bunch of horses from an auction prior to us coming out.The horse I ended up using was afraid of water.It wasn't a real big deal because I've trained a few young horses to get over their fear of water but I had some hairy rides each day on this horse.No way would I have wanted a bow slung over my shoulder.