Harvest early - it's not like 3 days is going to matter.
You do NOT want to fuck with the IRS. You know, that is how they got Al Capone. The cops couldn't touch him, but the IRS nailed his ass. If they see a substantial grow operation it will automatically be tax evasion. Now in some respects they might not care about a few plants, but since they are coming to your house, I wouldn't screw around. And when it comes to the IRS, you don't have the rights you do otherwise - do NOT fuck with the IRS.