Well here's a different point of view. The first 72 hours are going to be very stressfull. All the components of an MRE are designed to provide lots of calories and nutrients. You've never been as awake as you have after mixing the coffee, cocoa, creamer and sugar from an MRE and drank it. I can tell you after 50+ hours with no sleep, you are wide awake. The body burns more calories under stress than under exercise and an MRE will will sustain you under heavy stress.

Everybody has thier own views and what works for one may not work for another. In my opinion they are a valuable assest, (I keep two cases in my truck tool box) Depending on what you are able to carry and what you think you will need, try several different things.

In this case I'm not going to argue with anyone, I tend to be Over prepared.