I didn't read the link, but a good recipe you can experiment with at home is "Pemmican." It'll last about 10 years and was a staple of Native Americans living on the Plains.
Surprised they didn't mention Pinole, or indian Corn, which was a staple of many a frontier diet. It was said to be the best food for long journeys, pound-for-pound, that a man could carry into the wilds, but the authors of the time stressed that it was a food to be eaten when all other sources failed. Horace Kephart devoted a few passages to it in his book on Camping and Woodcraft, wherein he quoted an old outdoor periodical that laid out several different variations of that already very old recipe.
Found a site with some interesting info about Pinole: