There's some good suggestions here, but I thought I'd share what my husband and I figured out. Yes, if you're not using instant, grind oats to powder and add dry milk. It cooks much faster. My husband said this method didn't "stick to his ribs" as well, though. Dry milk does go bad, but get all the air you can out of your baggies and it'll make 60 days easy. We make individual bags of quick cook oatmeal (no grinding) with whatever seasonings he wanted. Then I freeze individual bags of reconstituted dry milk (with a bit of vanilla extract). I reuse the bags every batch (I do clean them :-) ) and all he does is throw a few in the fridge every few evenings. I do a month at a time, more when I get a good deal on dry milk. For the rare morning he doesn't have thawed milk (because I stole one, shhhh!), he just uses boiling water instead.
I will say my husband likes his oats more savory and less sugary. One of his favorite flavors is a sausage seasoning blend that he adds apples/pears to. I can't comment on the coffee creamer cause I'm allergic, but my husband refuses to use it and he eats everything!