One thing to remember though, and damn, this is important, is to make sure there is no moisture what-so-ever. If there is any moisture, and you seal it up, it'll go moldy, and if it does, you'll have to bin it because you cant smoke mold... cos it'll make you very ill.

So make sure its very dry. [You can always re-moision it when you have it out of the bag, but no moisture in the bag]