Well let me jump in here. :)
I kinda see it like Y2K. It could happen, so prepare, but it very well might not, so don't line every wall with canned goods (only to realize you have only an electric can opener! Gaaaaa! Where's the machete?). I have a few things. Which I just use till they're running low and then get new. Like I buy bulk organic dry potatoes, dry milk, pinto beans (which lasts no time around here), cornmeal, flour. We're way out in the country, we're on a well, but the in-laws have a generator (we share the well) and farm gas/diesel that could be used. They always have a HUGE garden, the sisters and I all have little ones. I can things, including lots of GREEN tomato stuff last year since it frosted early. Seriously, 2 laundry baskets full of green tomatoes. Couldn't just waste them. I figured if we're starving, they might look good..... Hubby has hunting rifles, so does my FIL. They also have some ammo. There's 2 lakes within walking distance for water and fishing. They have little things they've used camping for survival, and we have a wood stove and charcoal grill. My FIL knows a lot of wild edible/ medicinal plants, and I really want to get a book on it soon. It might not be convenient if there's ever a problem, but Lord willing, we'll survive.