I am not a prepper but grew up producing most all of our own food and still do. I would get a good canner and learn to can fish and meat, veggies. you would be amazed , I have wood heat , water wells , ponds
Wildlife etc.
Look at Bloody decks in the food /recipe section , lots of good info on canning fish. also about any good canning book. I enjoy it.
To each his own I don't worry about it much. But I live on a dead end road at the end. I work in the middle east and understand how fast things can go down hill.
Personally don't want to live through nuclear war.
In saying that I have seen a lot of unmanaged ponds , I would go with CNBG, RES , LMB, and harvest bass when they become overcrowded. its pretty easy to tell when a fish doesn't have enough to eat. You will be surprised how many fish dinners your pond will produce.
Dale