I wouldn't leave the rice in the bags. After a few years the ink on the bags begins to gel, I would call it, and slough off. It also degrades the plastic and, though I haven't tested to be certain, looks like it ruins whatever it touches, food wise.
I would take the rice out of the factory bags, period. Even the opened rice in a closed bucket will store better than if left in the factory bag.
As far as bulk oatmeal goes, we stock it in #10 cans from the local LDS home storage center/cannery. It's $2.50 a can here in the RVA and should be the same price anywhere in the CONUS.
We go through approximately one can per month normally, excluding any major baking projects.
Civilize the mind, and make savage the body.