If society breaks down to the point where one is expecting to have to kill many people in self-defense, the city/suburbs seems like the worst place to be.
If my plan is to stake a claim somewhere in Wyoming, for example, where I thought encountering zombies would be rare, then my survival plan is probably going to look a lot like what people do every day in rural America.
Only problem is that every self sufficient suspecting survivalist I’ve met has the same idea about Wyoming/Idaho areas. I would fully expect those areas to quickly become city/suburbs in population after the outbreak of anarchy, with everybody there armed to the teeth feeling threatened by any other outsider armed to the teeth.
N.W. Kansas would be my destination. I've already seen that they don't need anything from the outside world to survive, they can do it all on their own. From fixing, welding their own farm equipment to growing their own food with an over abundance of game animals........