Re: a sign on your residence: The Smiths vs. The Smiths’ [closed]
The sign over the store says Tiffany & Co., not Tiffany & Co.'s even though it is identifying Tiffany & Co.'s store. I think your first thought, here are the Smiths, is the better reading of the sign.
The fewer apostrophes in life, the better. If you really have to display your name in this way, some alternatives are Mr and Mrs Smith, Mary and John Smith and The Smith Family.