Hoarding food, is good to a point, unless you have to move. This country in most parts would be stripped clean of most available resources in most likely one month, give or take a week or two. Keep in mind that even the American Indian during rough times starved to death. They did train many if not most of their own horses, and it is said that the Nez Pierce bred the Appaloosa into a breed of it's own.
Knowledge is the key to survival if survival is achieved. I have a friend that thinks gold is the key. I asked him if an economic collapse occurred, whom got to determine what the gold was worth? His reply was the owner of the gold, to which I asked: What if the other guy disagrees? For that he had no answer. It was then that I advised him that you cannot eat gold, and with lead and gun powder, coupled with a launching device, commonly referred to as a gun, you can most likely get all the gold you can carry off.