Dry your own food. My family and I go on a 4-5 day pack every year and we dry a bunch of food beforehand for the trip.
I generally put together a pot of spaghetti for 10 people.
I make a huge pot of sauce (about 1.5 Gallons) and dry it out in the oven. It is a hearty meaty sauce. After drying the 1.5 gallons can be reduced to ~2 pounds. Add in some noodles and you are ready to go.
Chili is another good one. Dry it out in the oven. Add in some tortillas and eat up.
To hydrate, just add water, simmer and eat. It comes back to life as if it were never dried out and tastes like you made it at home.