And will the police in that county bother to enforce it?
I’m not sure that the police will be needed to enforce it. The local businesses are in fear of being shut down and destroyed. They will refuse to allow patrons in without masks they will refuse to let their employees work without masks.
Do you want to buy food at the grocery store? Do you need something at Lowe’s? Do you need gasoline? Do you need your job? When you are not allowed to participate in commerce as a seller or consumer, you will have no choice but to comply. This is how fascists work. They don’t necessarily have to beat you or arrest you, all they have to do is starve you - and your family.
By the time the sheep look up they will already be in the slaughterhouse.