You need to consult a lawyer in WA. Although your state may have medical mj laws it is still a federal crime. A producer growing in quantities can be subject to federal scrutiny. This is one to be careful on.
I agree with my collegue. You need to discuss this with an experienced criminal defense lawyer admitted to practice in WA before you take any action in regards to this. Marijuana is a Schedule I Controlled Dangerous Substance under the Federal Criminal Code. Potential risks include you and everyone involved being charged with Possession and Possession with the Intent to Distribute, even if you do not actually dispense any to another person.
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