There’s a movie with a cult where the leader is trying to go into the after life then come back. I think it’s set in the seventies or eighties. The cult dies when they’re trying to kill them selves to complete their mission. Then years later these kids/people are nosing around and stubble on the cabins and are interested in what happened. Then one of the new people does and the old cult leader come back to life through that guy, and starts killing the rest of them and brings back the rest of the cult.