One of the top three priorities in any survival scenario is the need for food, which is often in short supply when the s#%t hits the fan.
Which is why you may have seen recipes for hard tack, aka survival bread, floating around on sites like Pinterest- it's a must-have during a disaster scenario and the stuff has a shelf life of around a year or two.
Plus, survival bread is made with just three ingredients- water, flour and salt, which makes it ideal for dire situations where the crops are gone and food is hard to find.
Survival bread can be baked over a campfire inside a grapefruit or coconut, you can sub in sugar, oats and mixed fruit to give the bread a little flavor, and if you add olive oil to the mix the bread becomes way more palatable.
Read Here's The Deal With The Survival Bread That's All Over Pinterest at BuzzFeed
I'll take a sealed plastic bag of rice for survival food any day. Dirt cheap, lasts forever, has all the vitamins/minerals needed, requires no pre emergency prep, tastes a lot like bread, very calorie dense and relatively lightweight. You can easily figure one lb of rice will minimally feed one adult for one day, which means one of those $8 25lbs bags will get your through nearly a month.
Water is the real limitation, you need one gallon of water per person, per day. That's about 8.5lbs for every pound of rice. Fortunately you may need considerably less water in cooler weather and with reduced physical activity, but you're still dependant on those immovable 30gal trash cans/bathtubs/water heaters filled with water. That is unless you're sure water will be available, then you can take just a filter or purification tablets and just a few gallons with you.
Of course in a lesser emergency you'll want some more variety from your food, so you can throw in some cheap generic boxes of mac & cheese, maybe a couple cans of stew/chili/meat, ramen, a bit of candy, etc.