We've used the Hungry Hiker's cookbook, by Gretchen McHugh, for nearly 30 years. It's allowed us to eat food that we would (and did) eat at home while backpacking, sailing, and now, RVing. It became a habit to dehydrate something from every meal we made and, over time, we had a pretty good selection. (An example would be if we made spaghetti sauce, we'd spread a couple of servings on a backing sheet and stick it in the oven at very low temperature (with the door propped open)overnight then crumple it up and put it in a Ziploc bag. If we had green beans with the meal, a couple of servings could also be dried.) I can't say how long it lasts since we used it pretty regularly and replenished it often.

Another advantage to drying the food you normally eat at home is that there is no shock to your system when you switch to the "rations".

Unfortunately, we've largely gotten out of the habit but thanks to this thread I think we'll beef up our pantry again.