As a Ret. LEO I say good luck collecting these guns. All I would say is "their not here, you can not come in my house, come back with a warrant and you can see for yourself". Next be on the phone to a lawyer and be ready to comply when my door gets kicked in a few hours later. This is a "concern" we have lived with as RAW owners for 20+ years and I am sure nearly everyone has their own plan on what and how they will address this issue.
Me, I can't give them what is out of their reach, and no, I would not use the fell in the ocean bit. Because when it is found to be unconstitutional and thrown out I will want to use my RAWs in Ca. again. But then again by that time I will be a resident of a state that believes in the Constitution.