These are my personal experiences harvesting, cleaning, freezing, dehydrating and cooking wild oyster mushrooms. These mushrooms are prolific in the Pacific Northwest and they can be found any time conditions are right for them all year long. Delicious and fairly easy to identify, there are many varieties including a late harvest oyster I'm particularly fond of.
Oysters are easy to clean. Do not clean them with anything but a dry brush or towel until you are ready to cook or otherwise preserve them.