http://www.backpacking.net/packwate.html
You must also accept the fact that you can not carry civilization with you, not all of it anyway.
Your BOB will also be different under different constraints. If you are living in a hollow tree or in a hole under a bridge you will need one thing, if you are merely moving down the road due to a railway chemical spill and checking into a motel room or shelter, as 99% of the bug out scenarios are, you will be faced with other needs.
I consider the most important parts of my bug out gear to be my credit card and picture ID so I can check into a motel room rather than the Red Cross shelter down at the local school gym.
Most, if not all, of the things that will run you out of your home will not even affect the area 10 miles down the road.