For wheat, spaghetti is easier to deal with than baking bread. Is it nutritionally about the same? Maybe someone here knows. You can buy it in convenient 1 lb packages almost as cheaply as in bulk, and it stores very well. I have been wanting to try some powdered tomatoes for making sauce.

Dry beans cook fairly quickly in a pressure cooker. Combined with rice you get complete protein. So I'd go for a few sacks of those, as well as rice and other things.