To respond to your "I doubt there is an inch of coastline in the US that you can get this experience from. Fifty years from now, probably not an inch in Baja either..."
Come on up to Washington State & we'll show you one of the last in the lower 48. There are only a few small towns on the entire Pacific coast of WA. And one of the worlds 10 best beaches. Only a short 1-2 mile walk from the nearest road. ;)