Hi Patsy,
Michael will probably be able to tell you more, but although Seaton Sluice was very busy in the past, it never seems to have been that big in terms of numbers of families living there. When you read about all the industries, some of which were going on concurrently, you get the impression that there must have been thousands of folk, but as far as I can make out it was more like hundreds.
I'm in the throes of having my house re-wired and am currently trapped in my bedroom with my laptop attempting to keep out of the way of the electricians! When things get back to normal, I have a photocopy of an 1812 map which I can probably scan in 4 parts, join together and email you. I can't see any of the family names you've mentioned on it, but like I said, it doesn't include Rocky Island, Sandy Island or Seaton Lodge, all of which were home to a number of families, so it doesn't necessarily mean they weren't around.