Sous vide pairs great with backcountry cooking. I have a friend who does competition barbecue. He's cooked and vacuum sealed brisket and pork shoulder for me to carry into the woods. Keep it frozen as long as you can (e.g. cooler, hotel fridge freezer, etc.), then wrap tightly in clothes or a shemagh and keep it buried in your pack (or stick it in your small packable soft cooler with your other cold/cool food items). I usually try to use it within 24 hours of the last traces of frozen disappearing. However, considering it's pre-cooked/smoked, it'd probably be just fine for 48 hours. Anyway, you just need a big enough pot to immerse the vacuum-sealed pouch in. Add a few rocks to keep it off the bottom, and fill with approximately room temperature (not necessarily ambient or as-found temperature) water, then put the pot over medium-low heat from a camp stove or campfire. You want it to take at least 30-60 minutes under that slow heat before the water boils, and as soon as the water does start to boil, take it off the heat.
Incidentally, No Name brand steaks tend to come sealed in individual plastic pouches also. These are a great way to pack in raw beef that's ready to go, as easy as grabbing a box from the grocery store. Alternately, my friend pre-cuts, marinates and freezes backstraps or tenderloins from last year's deer, and we pack those in. Either way, he cuts green sticks to kebab the steaks and sears them over a campfire on a metal grate. In our experience, the steaks are often still partially frozen the first night in, so instead we plan steaks for the second night, and BBQ brisket or pork the third night. These meats are all heavy wet weight of course, but they sure are welcome those first few nights of a longer trip, and once eaten you're just left with some plastic bags or FoodSaver pouches to pack out.
If you can find a good way to pack in meat for your main entrée, many options for sides to make it a real meal are pretty easy. Mountain House used to make Cut Green Beans that were fantastic as a side, but they're long gone now. Sometimes you can find them in bulk from other freeze-dried brands. MH had some sort of corn and peppers thing a while back, too. I think it was intended to be a vegetarian burrito filling, but it made a good side dish (or a mix-in). I haven't seen it for years, but other brands still have some similar options.
Instant mashed potatoes are pretty decent and ubiquitous these days. I like grits, and instant grits are about is easy as it gets. Some other favorites for us are instant (or old-fashioned hard-way) rice. Uncle Ben's, Zatarain's or Rice-a-Roni brands of instant rice have all been carried in by us. I do good old long grain brown rice for my red beans and rice, although cooking rice the old fashioned way can be surprisingly difficult, especially in camp. Another favorite of ours is Wild Blend rice. For me, the blend seems to be a bit more forgiving to cook than single-variety white or brown rice. We used to get the Lundberg brand, but several are available these days. The nutty flavor of Wild Blend rice goes equally well with steaks or with any fish we happen to catch. A former coworker used to make dehydrated Risengrøt (Norwegian rice pudding) from a recipe he found on a backpacking website, which makes a good breakfast or desert to add some variety.
Many fresh/raw vegetables survive being backpacked very well, and may last longer than you'd expect. Whether bruising, discoloring or turning to mush, it's pretty easy to see when fresh vegetables have gone bad. Most aren't very weight efficient, but you can't beat real, fresh foods if you can work them into your food plan. A mix of fresh, instant and freeze-dried foods adds welcome variety on a trip. If you're serious enough about your pack weight, you have food listed in your weight spreadsheet just like all the rest of your gear, and you know the weight of each meal and work it into the plans for appropriate days. I think that can pair well with backpack hunting, where you pack in a bit heavy on food, but you're down to nearly your base weight by the time you pack out camp and your harvested meat.
Back to fresh vegetables, asparagus is a favorite of ours, especially with steak and (instant) mashed potatoes. Coat with oil, optionally season, and grill it over the same fire that made the steaks, while those rest. Other fresh vegetables we've packed in include potatoes, zucchini, radishes, carrots and parsnips. Some are more versatile than others, but all pack pretty well. Onions, celery and bell peppers (the holy trinity) are more difficult to pack, but they are relatively light, very versatile, and they're usually still useable if they get crushed a bit. The best thing about most fresh vegetables is there is often little to no waste.
Many vegetables used as recipe ingredients can be substituted with dry versions for better weight, pack space and shelf life. There are several options in the spice bottles at your grocery store. This is a great way to convert heavy or "wet" ingredients in a normal recipe to something more pack-in friendly. Look online for substitution ratios. For example, it's 3 tablespoons of minced onion for every 1/2 cup of fresh chopped onion, or 2 tablespoons of celery flakes to 1/4 cup chopped celery. However, watch the prices in the spice aisle. Those little bottles are expensive, and it may be cheaper to buy freeze-dried or dehydrated alternatives more in bulk.
An example meal of mine that is stable for days, light in the pack, quick to prepare, and employs several of these ideas is my version of camp tacos. I use Mountain House Diced Beef, measured out and repackaged from the #10 can (prices on the cans vary a lot; watch for deals over time). Taco seasoning could be the store-bought pouch, but I make my own from an online recipe, substituting McCormick minced onion and garlic for the powder versions to give more texture. If I had planned to have a fresh green pepper along for another meal, I'll save some of it for this one. Finally, I pick up a box of Rice-a-Roni Mexican rice (don't trust the box in your pack--repackage it), a block of cheese to shred, and of course some small tortillas (which I would have for breakfast burritos anyway). To stretch it for a larger group, I'll add dried black beans, although they add some planning and prep complexity. I've never used pre-cooked dehydrated beans, but they would better match the quickness and convenience of the other ingredients.
Take a slow, browsing trip to the grocery store sometime with camp meals for an upcoming trip in mind, and you'll be surprised how many options and ideas you may find. Beyond the regular grocery store, if your area has a Mexican, Italian, or Indian market (or whatever ethnicity is in your area), you'll likely find some really good packable camp meal options, or at least ingredients. A lot of historical foods from many different cultures were based on long shelf life with no refrigeration; the trick is finding the ones that don't take a day (or more) to prep before eating, and are based on ingredients you can still get.
One thing I've meant to try for years but haven't yet is a pack-into-camp version of old fashioned Texas brick chili. Melting a packed-along brick of suet, dried beef and spices in a pot in camp seems to make as much sense now as it did 200 years ago. Of course, I'm not from Texas, so I would have to add dried beans, too.