A few years ago when my daughter and I were waiting for my DH and son just at the opening of where the Haunted Mansion lets the people out of the attraction, it was dark outside, we were sitting on that little stone wall sort of an area, and I felt the presence of many ghosts, etc., I felt. It had nothing to do with me thinking it was the haunted mansion, there was just a sudden feel to the air that we were not alone. It was eerie.
I do believe I felt the presence of ghosts a few years before that; it was my husband's grandparents on both sides of his family that I felt their presence (spirits, ghosts, etc.) I felt their presence at the farmhouse where one set of them used to live (where my husband's parents then lived, and we had gone to visit them.) I was nursing my baby daughter in the dark, in the middle of the night in the living room, and all of a sudden I knew that the 4 of them were sitting there on the loveseat a few feet away from us. The hairs on the back of my neck stood up, and although I was terrified to look up because I knew I would literally see them, I knew they meant no harm so I averted my eyes (out of my own fear) but gently turned toward her toward them a bit so they could see her beautiful face. I knew they were smiling at her. I am getting chills now just remembering the feeling. I said to my husband that it was so odd, because I had never known them or met them; I had not been thinking of anything in particular, but suddenly I knew who all 4 of them were, and what their purpose was. They just wanted to meet their great grand daughter. When I was finished nursing, I went back to the room, holding her, again, to display her toward them, but too scared to look, and I took her back to our room. The feeling was that distinctive to me, that I knew who they were, and what they were there for. And yet, I had only felt their presence, and been too afraid to look to see.
So yeah - I believe the OP's posting is possible.