Obviously this is not legal advice, however...
Keep them in the safe, never use them, and never get into police trouble, and you should be fine. As long as you don't get into a situation in which the police are able to search your house, the firearms in question will never be discovered.
If this is just temporary, I would just keep them in my possession. But that's just me. I'm glad I left California a decade ago!!!
.45acp, .40 S&W, 9mm, .38 Spl, .380 acp, 22lr
12 gauge, .223/5.56x45mm, 30-30 Winchester
2 Chron. 7:14 Christians must seek His face