A single yo-yo would be like a single snare... you need a bunch of them to cover enough territory to feed yourself for very long. I've got a couple dozen that I keep on hand in case the balloon DOES go up, but for a BOB they'd be too bulky/heavy to take with you, unless you're evacing in a Kenworth (if you're carrying these, you might as well include a dozen or so Conibears, a cabin tent, couple hundred rounds for the pistol, couple thousand for the rifle, fifteen or twenty cases of MRE's, etc (that's not saying I don't have them laying around here SOMEwhere)) <img src="/images/graemlins/shocked.gif" alt="" /> <img src="/images/graemlins/wink.gif" alt="" /> <img src="/images/graemlins/cool.gif" alt="" />.
Troy