What’s scary is when you try to figure out how much fuel and water you’ll need every week to convert those dried foodstuffs into meals.
We, with parsimony, could go for thirty days or more on the food we have on hand ...
1. If we are not successfully overrun by the zombies/barbarians
2. If we don’t share with unprepared neighbors
3. If we can maintain a supply of fuel and potable water.
That’s in a stay in place mode.
*IF* we could get to our retreat, there’s only about 10 days’ stuff there, but virtually unlimited water and fuel.
As far as long term cooking I recommend one of these;
A Rocket Stove:
http://www.stovetec.net/us/index.php