When I wore green, we ate c-rations. I've tried the MRE's a few times over the years, and the c-rats had them beat on everything except portability. Unless carrying the food around with yo is a big issue, I'd go with the civilian version of c-rations: canned food. Dinty Moore stew, Chef Boyardi ravioli, tuna, corned beef, chow mein, chunky soup, spam, fruit cocktail, spicy spam, green beans, spam lite, treet, turkey spam, spam with cheese...