Never reveal your hiding place.
When I was a child I believed there was a ghost living in our attic.
It was a friendly ghost. Often I would go there to play with him. We pretended I was his sister. He taught me how to hide in a cupboard, how to float through the air and how to whisper in ghost language. My mother couldn’t find me for hours. „Where have you been?“, she asked when I had reappeared. But I couldn’t tell her.
Ghost rule number one: never reveal your hiding place.