I never tried the cold drink mixes that are out there.. for me water , trail mix , jerky and bars work best when I'm away from water
How are those water mixes ?
As i live in CO, i know hydration at high altitude is imperative. However, I've learned that simple water isn't enough.
So, i supplement it with the Gatoraide packets I can add to my Nalgene bottles. I notice a difference in how well I respond to the additional fluid i take in vs just water.
As to food - in general i prefer "boil-n-eat";
Dinners - i like the powdered mashed potato mixes. They are awesome! One pkg = TWO servings. I like to add in 1/2 a pkg of gravy mix with each mashed potato serving. I use the chicken-in-foil pkgs and add one to the mashed potatoes/gravy for a very nice evening meal.
I also (in advance) fry some ground beef and make taco meat then freeze in zip-lock bags (which i can boil in a pot). Add some Dorito's and cheddar cheese and I've got a nice dinner.
Another tasty meal is a Ramen-noodle pack with 1/2 a pkg of the pre-cooked chicken. Add some cheese and a little Cayenne pepper (a LITTLE) and the spice adds some spicy heat which in turn heats my body up a good bit.
Breakfasts - oatmeal. It's easy to make along with hot cocoa in the morning.
Lunches (eat as i hunt) - beef jerky or some deli meat, cheese, mini-Snickers bars and nuts (almonds mostly).
So that's pretty much my food prep. I'm not a backcountry chef (or a chef *anywhere*), but my appetite is always satisfied.