put some calciumchloride along them, be sure that the shrooms don't touch it, and put the box in the freezer. they will be good and super-dry for at least one year without any loss of potention.
and here's the final solution to the taste-discussion /forum/images/graemlins/smile.gif
you can powder them in coffeegrinder and put them in 1g gelcaps, easy to dose.