Seed is a good idea. I don't think there's anything wrong with metal either. I think the best advise is to diversify. Some of this, some of that, heavy on the beans and bullets. :-))
I used to watch those prepper shows and what I noticed was people would get fixated on their particular fear and focus in on protecting against that instead of spreading their survival budget around for an "in general" survival approach. Tornado's, earthquakes, fires, hurricanes etc are much more likely to happen than say a devastating solar flare, nuclear attack, etc.
My garden sucked this year. I heard a lot of people in this area fussing about how bad their gardens did. I got some seed for these really huge tomatoes. They were supposed to produce tomatoes in the 4 to 7 pound range. I got one plant in the dirt after starting maybe ten. It grew to be about the size of a regular sized tomato plant when it was supposed to be an 8 foot tall plant. It produced 4 tomatoes barely bigger than a golf ball. Peppers didn't do well. No Carolina reapers. Very few jalapeno. I did get 10 ghost peppers off a plant that never got more than 12 inches tall. It was just horrible.
I did get some decent vine fruit until the fungus or bugs took them out. Planted, for fun, some Butternut squash. That's an interesting tasting squash...taste something between a sweet potato and pumpkin. Grew a pumpkin that's 2 feet through the middle. But that separated from the vine nearly two months ago. Been saving it for a Jack-o-lantern. :-)