I purchased a dehydrator after getting very tired of store bought backpacking meals. I have been dehydrating my own camp meals for several years now and highly recommend it. Often I prepare a large meal, then dry leftovers, vacuum seal, and then freeze until my next outing. The only rule with drying food is NO FAT. Often this means you must omit ingredients such as oil, butter, cheese and carefully trim any fat from meat. Although jerky is popular, I prefer to marinade my steak, then grill and dry. Just be careful not to over dry. Poultry especially can dehydrate so much that it will never Rehydrate no mater how long you boil it.
Rather than combining all the ingredients then drying, it works best to separately cook sauces, meat, starch and then dry separately, combining at the time you rehydrate. This is because drying times vary, so combining first may over dry others.
As an example, here is one of my favorites, spaghetti. I brown extra lean ground beef with onion & spices, then rinse under water in a colander to remove all fat. Next, stew fresh tomatoes, mushrooms, sliced olives and spices. Finally boil the noodles. Take all three macro groups and dry on a separate tray of the dehydrator. The tomato sauce you will need to put on the fruit leather tray. The beef and noodles will dry first; remove them and vacuum seal immediately; once the tomatoes dry seal also. I put both sealed bags, into a larger bag along with a paper towel and small amount of Parmesan cheese. The second bag is helpful because often the dried food has sharp corners that will penetrate the seal of the first bag. Wrapping with the first bag with a paper towel will give it more padding and a napkin out in the woods. The entire meal stays in the freezer until I get ready to leave. This is because there are no preservatives and it is possible for the meat to go rancid. Keeping it frozen ensures that no bacteria will grow.
To rehydrate, I use a Jet Boil, add a small amount of water (otherwise you end up with a soup), and bring to a boil. Stir, cover and allow to cool, then eat --yummy! You will never want to eat the stuff from REI again.