When a guy like the OP asks a simple question such as where he can get MRE's, I pretty much figure he's eaten some, likes them well enough, can read the label, and is going to buy some to eat on his hunting trip.
So the only useful advice I could provide would be where to find them. In other words, an answer to the question he asked.
Lots of stuff people take on hunting or backpacking trips would not be good to eat regularly. Mountain House meals generally have enough sodium to kill a horse.
But so what, if you're only going to eat them for a few days.
