In my Peak Prepping days, I had about 2 years worth of long lasting foods.  I think there are plenty of serious preppers with 10 years worth.  I'd bet some Billionaires have bunkers with 50 years supply.

No matter how well hidden it is, people around you will notice after a few months you're not as skinny as they are and will become suspicious.  Either you choose to start sharing it willingly, or eventually they'll come and take it all from you, and they won't be nice about getting you to tell them where you have it hidden.  So you can't really say you have 2 years supply, unless that means 2 years supply sharing it with a dozen others who will help you protect it.

My philosophy was I would keep my supply secret for about a month, but if Da Goobermint didn't come through with food aid, I'd share what I had with my neighbors.  Figuring it that way with rationing, it might have lasted 3-4 months.

I wouldn't want to be the only person left alive munching on my food for 2 years anyhow.  All you are doing is delaying the inevitable at that point.

RE