I gotta say, I don't disagree with the choices you put forth up here. Simplicity and a backup of each gun makes sense - better to have a lot of a few things to guarantee a certain level of ability than to have all kinds of different gear that can't be replaced and if lost leaves you with nothing.
That said, I feel that in a disaster humans are as much a threat than the ability to get food or other domestic duties. As such, I think that the defense abilities of your collection is the ONLY area that I feel you're a bit thin in. The average person isn't prepared for a 1-day snowstorm, imagine in a real disaster when there are people starving what people will do. If you are well-supplied people will come after you, and if they are themselves armed with more "aggressive" guns, at least in the short-term, you may be outmatched. The revolver can be slow loading, the single shot shotguns and bolt rifles can be slow firing, and the .22 lacks power.
Although these could be used well, as I'm sure you are well practiced and skilled with them, to me it seems that there should be something with more power and speed. Nothing too fancy, Even a pump shotgun could give you a leg up.
That's just MHO, and I mean no disrespect for your collection, EH!