The biggest problem with this concept is the fact that certain areas of the country, or any country, are more fertile and.or seasonal than others. Without shipping and large scale farming in various parts of the country, the individual in the upper mid west, say, would have to rely on canning, pickling, salting, and freezing to sustain food supplies for the five to six months of winter they're going to experience between October and April (and sometimes the first half of May in my particular area). Most forms of food preservation are unhealthy, expensive, nutritionally damaging or all three.
The majority of people don't even have access to flash freezing or freeze drying equipment; most people couldn't afford to acquire it; some others wouldn't be able to afford to run them to the degree necessary. Solar and wind energy for the individual is a good idea, in these instances where energy costs are a factor, but the equipment and materials needed to implement these things on an individual scale are extremely expensive.
While that type of thing is reasonable for people in some parts of the country, or folks who don't mind what canning, salting and pickling does to them or their food, it's not practical for the people in the vast majority.
This is also from the perspective of a person who doesn't eat the dead. I'm sure, to a small degree, hunting and winter harvest crops could carry you through a mild winter. You'd still have to deal with storage and processing of the kills for proper preservation and nutritional content.
It's all too much of a pain in the ass. I'd rather just buy my apples and tomatoes at Earth Fare and spend the time I'd have wasted growing them on making virtual teddy bears dance or hanging out with my friends. To each their own, though.
