Good book. Another that gives more of the perspective of staying in the community instead of bugging out is "One Second After" by William R. Forstchen.
Yep. Remember, you can only (effectively) shoot one gun at a time. So even IF you have a good BOL, if someone knows you have something they want, all it takes is a few of them to take it from you. I've figured that if it becomes WROL, I can band together with neighbors and we can arm some who don't have guns. At least that's what I tell the MUCH better half when I buy another gun.