I don't know about freezing them but just keeping them in a cool dry place is fine. I keep mine stored in a box in the garage and they have all been fine. Just don't put them in the attic or on the dashboard of your truck and they should be fine. They were made for the extra long shelf life.
If it gets smoking hot in the summer I wouldn't recommend it but now that I think of it I would imagine that mine have froze a couple times cause they were in a detached garage and it was not heated. Never hurt any of them though.
I've had a few mre's that were frozen before. It didn't seem to hurt me or them. They tasted a little different. If I'm not mistaken they don't have much if any water in them. It's part of what keeps them so fresh for so long.
Can you freeze Mre's without hurting them?
I see the lower the temperature they are stored at, the longer they will last, but can they be frozen?
I was thinking of sealing them in a large, airtight ammo can, and storing them in the garage.
Good or bad idea?