Good info guys. I'll probably end up leaving the MRE entrees in there, adding drink mix, maybe some MRE sides too. As far the the Mainstays losing vacuum, I should be good. They're pretty much bubble-wrapped inside a covered big coffee can. (There's smaller stuff packed around them to cushion them, then they're inside the can, then there's stuff packed around the can to cushion also). But I'll keep an eye on them anyway.

I need to dump out my bag one afternoon and take pictures anyway, as well as working more on the packing of it so it's easier to find stuff.

And as far as living on MRE's and Mainstays, I have an iron-clad stomach. Nothing ever seems to upset it, no matter what I eat. Inferno wings, greasy chicken, anything... bring it on.

What's the general consensus on other food bars? I know one is cinnamon flavored, and cinnamon is on of the few things I just can't eat. What else is out there for variety in food bars?