I have 200 canning jars, two huge pressure canners, and hundreds of rings for canning all that's in the freezers. I also have 40# of salt for salting down meat, and crocks to put it in. There's also the pantry and the root cellar. So there's a lot on hand here, probably enough for a year.
I haven't stocked up on rice and flour/grains. They could be vacuum sealed, etc, but I never got that far.
Yes and they don't last as long I hear... I don't even have a lot of flour in my diet!
Unless they are kept in the freezer, any grain that has been broken/ground will oxidize in a few weeks, unless they are vacuum sealed with oxygen packets withing a VERY short time of being broken/ground.