Use a fan, desiccant, a strainer, and a bowl. Place your desiccant in the bowl, place the strainer on top of the desiccant (its helpful if you can wedge some desiccant packs between the sides of the strainer and the bowl so its not just at the bottom), place your mushrooms in the strainer and place your fan on top of the mushrooms/strainer/bowl. If your fan is too small to sit on the bowl without falling in, find something to support it on top. I use cut up porch screen when im using a computer fan, but i also have a small circular fan that sits on top without any additional materials. Now turn on your fan and let it blow down on your mushies/dessicant. I can get 4 oz of dry mushrooms from whatever wet quantity (i don't bother weighing wet, I see no point in it) using this method in under 48 hours. Sometimes I let it go a lil longer just to make sure its all dry. Once they're dry I put the mushrooms in mason jars, fill the jars with CO2 and pop em into the freezer for long term storage.
peace
SB