OK start now.
Mention in passing things you have heard about that area.
Watch the Blair Witch Project with the victim or alone just to take notes.
Set the tape delay for more than 10 minutes. 36?
Any chance of finding an accomplice to show up in the night, have fun, and leave quickly?
Think about rigging up small led "ghost lights" Via remote!
Missing shoes is a classic!
Pretending to be lost for 2 days could really freak him out too.
Go out a day ahead of time and dig a nice quiet grave beside the trail, leave a simple cross up and leave it nice and open with tools lying near.
oo:
Suggest a nice long night hike, if you are only in the tent at night then it isn't very spooky unless you count smelling farts and stinky feet as spooky.
Also if you each have a tent quietly packing up in the night and leaving the camp's line of sight while he sleeps is funny.
Perhaps it would be easier to make him think it is just vandals instead of ghosts. Just a thought.
Gunshots and screaming in the night will startle just about anyone. :devil: