Pickup with at least a half tank of gas
flash light and spare bats
Med kit
MREs
comfortable sneakers
toothbrush and razor (that's a holdover from my single days)
spare socks
.45 w/a spare box of ammo
couple of blankets and a poncho
case of diet coke
roll of toilet paper
I keep a lighter and have a few in the truck anyway.
FWIW, I live a half block from a highway that heads straight out into the boondocks. I strongly believe your BOB should be tailored to your area. Also, my truck is my BOB. I've got a wife and two kids with disabilities. The kids aren't walking a long way and I'm not going anyplace without them. Oh, and a ball cap and sunscreen. On the food, make it stuff you don't mind eating, and swap out every so often.
This thread is a good thing. Lots of good suggestions. For food I have boxes of basics laid away just for economic/emergency preparedness. Just need to toss one in the truck or car. You reminded me that I ought to have a small roll of TP in my fanny pack. I always used to. I have bunches of small rolls smashed flat and put in ziplocks specifically to take hiking, camping and to put in vehicles.
I have a system of bags/packs starting with the aforementioned fanny pack. Then there is a bag that attaches to my back pack that has my major wilderness survival equipment. The main pack has a bag of outdoor clothes, serious knife/axe, hardcore water bottles and other essential items. (kukri is by the door and ready to go for anything and everything) Depending on the reason for bugging out I could put everything but the battle rifle in and on the main pack and leave on foot.
I can and have loaded my truck with almost everything I own in less than two hours. If I wanted to take only the necessaries, food, firearms, ammo, camping gear, clothes, some books, water, I ought to be able to load it in less.
Food, water, purification filter and camping gear are loaded already. One quick load from the house and we are ready. I can make it to a more secure site on the secondary roads with the fuel on board.
I'm too stove up to be hoofing it much anymore. And if we can't make it to Point B we can go off grid for close to a year with a few more items loaded last minute. So I guess I've got a bug out vehicle instead of a bag. :)