First, figure out what the most likely threats are and what your responses would likely be, both for bugging in and bugging out.
I'd echo this advice.
In my mind, a BOB is a part of a larger plan, not a plan in itself. My pet peve with many bug-out related threads is the lack of definition and planning of what the bug out actually is. I see lots of stuff about bug out vehicles, bags, etc. (here and elsewhere) but I really think the crucial part of the planning is:
- What event or disaster would require me to bug out, to abandon my home and the preps there?
- Where am I bugging out to?
Having concrete and fully fleshed out answers to these questions will provide the neccessary parameters required to make those decisions about gear & transportation related needs.
For example, a realistic risk assesment might show the only real scenarios requiring a bug out are personal, like a house fire. In this case a bug out bag might consist of spare clothes and back-up documentation. However, those living in known earthquake zones may realistically be forced to bug out in a situation where not only they, but thousands around them, are displaced. They would likely need water, food, shelter, etc. in their bag.