Yesterways LTD wanted to take the visitors of the V is for Vampire Tour there. However after 1997 the city had refused to reissue permits to park the tour caravans on Main Street. Before that they could only park there between the hours of midnight and 4 AM. (PROSE: Possum Kingdom)
When Anji Kapoor visited New Orleans together with the Eighth Doctor the Doctor told Anji that any real vampires would shun cities like Sunnydale and New Orleans. They would not have enough privacy there. However Anji believed that Sunnydale didn't exist. (PROSE: The City of the Dead)
Behind the scenes Edit
Sunnydale was the town where the TV series Buffy the Vampire Slayer took place. However this wasn't mentioned in the novels.