What are you going to do when people migrate to your area in search of food and they are carrying weapons? If you're in an area with difficult terrain you will only get the most fit zombies and by then they will have banded together by then to take on anyone that opposes their desire to eat. When they arrive you will be their enemy whether you are sympathetic to their plight or not. Stockpiling to survive to the apocalypse is pretty stupid imho. Its not particularly difficult to tell who has food and when that person is discovered they will be raided immediately and likely killed by someone in the mob. If you barricade yourself in your home they will just set your building on fire even if that means losing your stores. Your best bet for survival is to form a tribe of people you can trust the moment a crisis hits and start raiding. The only way to survive by stockpiling is if you live in the middle of nowhere with no towns or abundant natural resources nearby. A place where there is no reason to travel to under any circumstance.