“ Camp ” writer and director Avalon Fast has a wonderfully specific genre designated for her film: “A bunch of girls in the woods doing weird stuff.” As if that doesn’t sell a ticket already, trust that Fast’s dreamy vision of friendship, queerness and the occult is a singular experience. “Camp,” in theaters now via Dark Sky Films, follows Emily (Zola Grimmer), who begins working as a counselor at a remote camp for kids dealing with different types of trauma, much like she is. Once there, Emily