Go to your grocery store. Now days there are lots of dry soup mixes, tuna and chicken in foil packs and bean & rice meals that are good to go. These have pretty good nutritional value. You can make your own soop mix (rice, noodles, beans or lentils, & dried veggies) and add meat from a foil pack or use the fish you catch. In addition to jerky, if you can find the aged (dried) summer sausage, it will keep without being refrigerated, but it's hard to find.

Spud