Popcorn for Long Term Storage
Well, the storage recommendation that I use as a guide recommends 20lb per person just to pop normally. But remember too, you can dry pop popcorn too (fats & oils will be in very short supply) and use the pop corn in cooking and for breakfast cereal. It is after all just puffed up corn. It still works to thicken soups, stews, “bread” puddings and so on. Even if it doesn’t pop, parching makes it easier to grind in to a meal.
If you can get it, flour type corn would be the best (soft & easy to grind flour fine) but regular field corn would certainly work. Corn is more susceptible to rancidity than wheat because of its fairly high oil content. That is one of the things that make it a good energy food too. The information that I have is on storing corn for several seasons in a crib but the principle should still apply. Canadian corn can be stored with up to 15.5% moisture but in South America it is 11 to 12.5 % is recommended so you may need to dry it to this level.
Now you need to know the average storage temperature of your grain over the year because heat is the other enemy of storage foods even when you have them dry & free of oxygen. Walton’s gives corn a storage life of 8 years maximum at 70oF even when packed for LTFS. Every 18oF above this halves your storage life. So at 106oF corn only stores 2 years! Fortunately, it is not in the hundreds every month of the year so you need to do a yearly average for your area of your state. You will need to do a web search. Say on average your yearly temperature is 86oF, then the storage life should be about 4 years. Even that is a pretty hot average so you might get 5 or 6 years but you need to know this! This is why I chose to store wheat in bulk (its storage life is 25 years maximum at 70oF) as I have had corn go bad and Wisconsin has few days even breaking 90oF.
Now if you can recycle the corn through you animals (either cracked or soaked until soft is best) and replace it regularly this is, maybe, not so bad. Up to you.