Backpacker Magazine has an article on this “great” beer for backpacking that you have to rehydrate and carbonate on the trail:
http://www.backpacker.com/articles/18161I’ve considered beer (and mead) just for this. It makes sense to me to just take along a high ABV beer of 9% more and fill it in plastic bottles, which is why I have some Mr Beer bottles. Quite frankly I don’t get the rehydration part. If you are bringing water to rehydrate it what’s the point in concentrating it??? I’d just make a Belgian Strong, IIPA, Imperial Stout, or a Barley Wine.