I'm on the fence. On one hand, I've never seen actual evidence. On the other, there are certainly things out there that seem unexplainable.
The closest I've come to dealing with a ghost was when I worked here:
This is the Badger Hole, the former cabin of cowboy poet Charles Badger Clark. He lived here for about 30 years. When I worked in Custer State Park, I would be stationed here once a week to greet visitors and show them around. Everything is in the cabin the way he left it when he died in 1957.
Everyone who worked at this cabin thought that Badger lingered around. Floorboards would creak and silverware would rattle in the drawers. We just felt a presence there.
We weren't scared, though. Badger loved his cabin in the Black Hills. We felt he was just hanging around in his favorite place.
Lately, a couple of strange things have happened around this helibase. A book jumped off a shelf. Yes, jumped (I saw it). And a bottle of saline fell out of the eyewash station for no reason at all.
Should we call in the cast of Ghost Adventures?