Do you have a paranormal group in your area? Now, I know ghosthunters crap has about sullied the field. But, from what I've seen there are some honest serious folks out there that don't charge and don't get on t.v. Have you considered a voice recorder instead or along with a camera? I wasn't kidding about a spiritual adviser or clergy either if you find or know one that you trust. On the other hand maybe you could sleep in the room yourself and see if you experience anything. Just some thoughts thrown out there.