"...of course it's a dream... and stuffed full of jailbait!"
Killer's Moon (1978) directed by Alan Birkinshaw
An interesting little gem I would love to see.
Escaped lunatics on experimental LSD used in conjunction with a radical course of dream therapy! They rape, mutilate and murder without remorse, believing that they are sharing a dream in which they have previously been encouraged to let rip, free of inhibitions.
A busload of choir schoolgirls breaks down, and I believe the fun begins.
"Blood on the moon, one mangled dog, one missing axe and one lost girl who's just found a body - at the wrong end of the axe! How's that for the great English outdoors!"
http://www.imdb.com/title/tt0077801/