I saw reference to this town towards the end of Season 2 of Supernatural. Watching the commentary I found that the town they used for the episode was based on Dudleytown.
Personally I know there is debunkery, this may or may not be real or it may be real now, but the origins are debunked and who knows why it's the way it is. Personally the idea of a town so haunted that it was abandoned sounds awesome.
Adventure Notes:
- Local towns full of inhabitants that exploit and/or hate ghost tourists
- Something based on the history causes the paranormal to kick it up a notch
- Legit tour groups go missing or encounter dangerous conditions.
- Local authorities go on lock down, not only enforcing trespass laws like they were donuts, but interfering with other legit business like tours and sales
- Something new has been attracted to the energy... maybe demon, maybe insane (or possessed) murderers.
- Might allow players to alleviate the situation... maybe contain, but not just solve.
I might run something like this for my game... not sure if I would want to fly the players from LA to CT or just invent a more local version of this town and add some SoCal flavour.
The Legend of Dudleytown
Dudleytown a New England Ghost Town includes notes about fines for tresspassing
A site devoted to Dudleytown seems to be the official site for a book and mentions tours
Dudleytown/Cornwall in Wikipedia
A creepy image of Dudleytown
Map of Dudleytown