I like the idea of making them yourself. Some folks posted what looks like a pratty good recipe above. Why not try it out?

Otherwise ... I vote for simplicity. Go down to your local supermarket. Pick the brand of granola bars that works best for you. I prefer the moist ones myself. Then buy a bottle of multi-vitamins (& minerals) and cram it in the top of your box of granola bars. Presto. Done!

Data says that human beings can survive a LONG time on minimalist rations, especially if essential vitamins & minerals are all avaialable. Nobody says it's fun. You may feel like eating your neighbors, especially if they're low in fat and high in protein. But you will get by just fine.

Pete

P.S. Oh, and I'd add a bag of beef jerky too. There's only so much of granola bars that a guy can take. Give yourself a break in the routine. If you get bored ... try trapping a few pigeons or ravens too. Plenty of good meat there.