Slash, Alice Cooper and some of the biggest names in rock from the 1970s and ’80s all appear in the trailer for forthcoming documentary film Rock Camp.The film documents Rock ‘n’ Roll Fantasy Camp, the American camp that for more than two decades has given people the chance to jam with and learn from rock stars, like Slash and Cooper, both of whom have taken on roles as counsellors over the years.Started by producer David Fishof in 1996, Rock ‘n’ Roll Fantasy Camp sees the rockers teach and