Hi, and welcome to our forum......
Really all I can say is to take your pictures in pairs, so there is at least two of every picture to compare with. And get ready to spend hour after hour going through them all.
Greetings fellow spook chasers, I'm planning my first trip to the groove to take some pics with a film camera. Any advise??
I would also suggest to put your still camera on a tripod. That way it would cut out camera shaking and false images. Some cameras are capable of taking 2 or 3 pictures with one push of the button. Use that multipicture setting if possible.
Take someone with you. That way if something physical happens or you hear something not normal, you'll have a second pair of eyes and ears to verify phenomenon.
If possible bring a video camera and video as much as you can.
DO NOT use your cell phone for pictures or video.