It’s a great idea to stockpile. I have Red Wheat (dried, life 10+ yrs) - this can be used as grain seed, or ground into flour, Beans (same story) as well as 5 gallon buckets of MRE dehydrated meals (Costco).
You might also want to look into a couple 50 gallon blue plastic water storage bins - as we can survive quite a while without food, but we gotta have water.
You are off to a terrific start. Don’t blow the bank and get into trouble. Just a couple cans every week or so; that way when/if they get close to expiration, you can cut your grocery bill down as you eat this stuff (and replace it with fresh) later down the road.
I’ve been really impressed with the Chocolate Milk powder, and Potato Pearls (if you can find those). The Potato pearls are ground potatoes that have been steamed, then dried - they make the best instant potatos I’ve found. I prefer them to the stuff on the shelves. Dried apples (for a snack), rice, beans ... and the biggest recommendation I can throw out there is this.
Stock up on salt (I like Morton Tender Quick) and learn how to preserve meat. If the SHTF and you bag a pig, cow, moose, deer or elk - you will be eating steak on day 1, roast on day 2 and getting rotten meat to chew on by day 3. Chances are you won’t have electricity - so the freezer is out. There are books on Amazon on the topic of “Charcuterie”. This will teach you how to preserve meat, from smoked and cured Ham, to bacon, to sausage. No refrigeration required, just like Grandpa used to make.
I have no idea how potable it is; but water is only 5-6 feet down around here.
http://www.foxfire.org/thefoxfirebooks.aspx