Here's one I've been making for a while, this contraption works as fast as I've seen. A dog, and one of these snapped on my belt and I'm good to go.
Just a "grouper fisherman's knot", basically a cinch knot locked down with a little epoxy.... snug enough to keep tight, but won't lock down to where you can't easily slip it off. Works on all sizes but the little pigs can still stand up if you don't clip 'em off to a bush. Redneck engineering at it's finest