Gemini tells me you should probably also add some dried tomato power -- it'll make the rice and beans more palatable, and add some vitamin C and A to prevent scurvy and blindness, while still being shelf stable. Obviously you can do more with a multivitamin, a few lbs of iodized salt (for your thyroid), and if you wanna really weather the failure in luxury, as much ghee as you can keep around. I think I know of a @Great Ghee guy who can help you out on that last point. Unlike butter, it's shelf stable. But if you're going to keep 2 things to make sure your caloric needs are met, it's hard to go wrong with rice and beans for the cost, weight, and stability. Going with only one or the other will leave out amino acids.