It is just a pipe dream. What you need is a safe place to hide out.
Just trying to survive in a non functional society will be hard enough, let alone with people out there trying to kill you.
Hemi
I am not so sure that there IS a 'safe place to hide out'. There are places that are less accessible, harder to get to, but all of America has been explored and mapped for many years.
A reason to have a goodly supply of ammunition, is that there is just no way of knowing how long a time of crisis and societal breakdown would last.
If you ever did have to defend yourself, even from a small group of attackers, trust me, you can burn through more ammunition than you think you will. I would not be comfortable with less than 3K rounds for every combat worthy long gun, and at least a thousand for every combat hand gun.
Knowing how to re load, and having a supply of components is a good idea as well.
