Abandoning our original idea

Our original idea was about a group of teens going off into the woods and staying the night there, just for a laugh but then they witness a killer trying to bury a body deep in the wood. The killer finds out that they have seen him burying the body so he tries to get rid of the eye witnesses one by one. This idea was abandoned as the council didn't reach to us in time about getting permission to film in the woods as there would be fire and people screaming. We then quickly came up with another idea which is about an exorcism on a 18 year old girl and her parents has called for a priest to take the demon soul out of her, this priest has had past experience with exorcisms, which is why the parents of the daughter has called him. He tries his best and gets rid of the demons soul from the daughter, but little does he know that the demon has just moved to another body, the demon has just switched into the daughters mum's body and then kills the dad and the priest, we like to leave it on a cliff hanger that if the demon killed the daughter or if the mothers soul fights back preventing the demon to kill her daughter, I like where the demon just switches body as it gives a twist to the story.