I had been thinking about the ways of providing enough food for survivors of the PS in the area where winters are long and cold. Since the gardens will be not very productive after the PS (drizzle, gloom, high winds) it seems to me that preserving of what we will be able to grow is the most important issue. Doing my research on how to preserve harvest I came to the understanding that all ways of drying and curing the harvest (sun, dry days, light breeze, electricity for fans, dry shade) will be not available any where on the earth after the PS. The moisture is the number one killer for long storage. Where in the warmer areas one can eat bugs and insects and plant the seeds over and over that will be not the case in the colder areas. To keep flocks and herds in the winter one will need the grain and hay to be stoked. You said that hunting will not be available for long. So it seems to me that long term survival will be possible only in the altitudes where temperature can support gardening or living near the oceans. If this is the case than starvation in the colder areas of the Earth will be the only option and we need to take this into account and many of us need to make a big changes to their plans after the PS time. Am I correct?
If one applied the logic being used here to the present day inhabitants of Earth, and the climates they live in, there would be few areas that would squeek through as habitable. You would certainly exclude the Eskimos, as their climate is too cold for crops. Yet they have no need for flocks and herds and growing grain, having adapted. You have our Aftertime prediction of gloom and drizzle formost of the world eliminating any kind of preservation means, ignoring that high humidity is an inciter for most crops. In those climates where crops cannot be grown year round due to cold, the colditself is a preservative. No need for a freezer when the window just needs to be kept open in a room.
The key to survival is to be resourceful, see the glass as half full rather than half empty, and explore new nutrition possibilities. In this it is important to look to the many ways cultures around the world survive today. Putting cabbage and apples in cold cellars, along with squash and pumpkin, provides necessary vitamins and calories aplenty, and these cold cellars are certainly not bone dry. Look back to 100 years ago, for examples, not to the present when electricity and transporting produce is everywhere. You have been led to expect the pantry of today, not the limited pantry of yesteryear. Change your attitude!