What about some sort of repair kit including a boresnake or other compact cleaning kit like an OTIS. I usually like to make sure I have at least a small bottle of rem oil along with a leatherman, camo duct tape, and some already mentioned paracord. When I cut a hunt short it is usually due to one of my aw sh** moments; dirt in my muzzle, scope out of whack, broken backpack strap, blown out boots, etc. If I hada dollar for every time I had to use para cord for bootlaces...