I'm very familiar with the place. It's urban and busy and literary and has the most fantastic bakery. And where they've gone is TOTALLY not Crouch End, in any way, shape, or form. I mean, it has its spooky aspects - it's fairly near Highgate Cemetery for a start - but this is... not it. *is amused*
*looks it up* Yeah, I can understand Stephen King being inspired by Parkland Walk, though.
(Fun facts: Gillian Anderson lived there when she was a child.)