It looks like I'm in the same lot as most of you; it depends on the situation.
Like Newracer, if it looks to be a short term situation then I'll hunker down @ home - solidifying my personal defenses here @ home and ensuring I have enough resources at hand in case it lasts longer than expected.
Nut, like Newracer, if it looks like it will be a long term situation, my family and I will be hooking up with best friends/hunting partners and heading to the mountains. There is a place I used to camp every summer that isn't easy to get into. The back way is difficult, even for 4x4 traffic. The front way into the area has a double choke point that could be easily defended, if need be.