+1 for alternatives to Mountain House. There are more and more small companies out there making good dehydrated meals.
This won't make a difference for acid reflux, but for comfort and consistency at the other end of the digestive tract, I take 1 or 2 teaspoons of psyllium husk each day. They also come in capsules. With enough water, it makes a world of difference for me. At the risk of being too graphic, it reduces the number of times I have to squat behind a bush, and reduces my TP use. The standard backcountry dehydrated diet is too low on fiber for my system.