drying -
spread them out on newspaper for 24-48 hours under a fan... that will get rid of most of the moisture.
then put them in a sealed container with a damp removing agent such as damprid... make sure the damp rid doesnt come into contact with the mushrooms or else they will stay perma-wet and not edible. after another day or so they should be cracker dry - bending them will make them snap!
you can just leave them as is, not sure how long they will stay potent for that way... or else..
either powder them and put it all in honey
or powder them and make mushroom chocolates.
ive done the honey thing, it works... but make sure its with a nice tasting honey, my honey was a bit of a sickly tasting one. the chocolate thing sounds even better, u can correctly weigh the total amount, divide by the number of chocolates u make (perhaps use icecube moulds) and dose accordingly.
make sure the mushies are cracker dry before you try these techniques, esp the honey thing... honey is a near perfect medium for preserving things... it has been used to preserve things for thousands of years by other civilisations. i've heard mixed reports about people storing fresh undried mushrooms in honey... either - the water in the mushrooms will get rejected and float to the top (probably depends on how thick the honey is), or wierd moving organisms will begin growing and hatching from the honey (eggs in the mushrooms!)... not a good risk to take.