Know the Untraveled ways out.
Know where the Storage depots for Gas and diesel are in ur area.
Know how to keep a car running and when and how to Aquire a different vehicle or transportation.

Take Note of where there are horses in ur area.

Know where large underground Storm Drains and Concrete bridges overpasses and other places u can seek Temporary shelter while ur on the move.

Don't pack or attempt to carry more than you need for 3 to 5 days!
If the DOOM last longer than a week, you will learn to hunt and survive or you will DIE and it DOESNT matter if you DIE in a BOX or on the RUN!

All a BOX and A HOARD of Supplies gives you is a little more time "IF" you can PROTECT IT from Starving Masses and Marauders.

DONT invest SO MUCH that U can not leave it behind!

MAKE a PLAN of Retreat! Pack a Go Bag!
And Be Ready to Move at a moments notice!