My grandparents raised 3 kids during the Great Depression and had a very large garden until they were too old to take care of it anymore. Had what I guess would be consider a root cellar, that was about 15X10 that was floor to ceiling shelves that by Winter was full of canned vegetables, fruit and meat. My grandfather hunted and fished for much of the meat on the table again till he couldn't anymore. Never forgot the hard times. Grandma cooked on an old wood cook stove till the late 50s burning wood scrapts that grandpa got from the ladder factory he worked at.
We tried to have a similar cellar when we were in our 30s and with less than a tenth of the shelving at a garden maybe a quarter of the size, gave up on the idea after a couple of years as to much work. They were hardier stock,
We're prepared to last a month or so in a SHTF situation, after that at out age I guess we die. I have told a few friends if the SHTF, to load up all their food, ammo and guns and come on out we have a more defendable spot than any of them.