I know this is a bit old, but
>what grain/foods would you store
If you're not a picky eater and have a bit of land i highly suggest bulking on barley. it grows pretty well even in shitty soils and is very forgiving to farmer mismanagement. It's probably one of the most versatile of the grasses. it can make alcoholic and non alcoholic beverages, breads, stews you name it.
i honestly don't know why barley has become less popular than wheat.