I don't like placing all my eggs in one basket, so I prefer the two weapon option. A stainless .22 Ruger MKII with bull barrel and a 12 or 20ga shotgun (pump or single shot) with a variety of ammo to maximize it's versatility is the way I'd go. A little more weight maybe, but worth it for the added benefit of still having a usable weapon if one is damaged or lost.