I used to spend a lot of time solo camping in and around the Indian Peaks wilderness in CO and experienced some weird stuff. Nothing that was outright supernatural, but just unsettling. I love those woods but they give me the creeps. Here are some notable examples from 4-5 trips up there in all seasons.
1 - After thinking that a particular area under a tree and against a
rock looked like a great place to set up for the night, I found a
shredded sleeping bag and old (must've been 20 years or more) camp
supplies. Found a lot of bones around the site too, ribs and vertebrae
-- probably elk, but maybe not. I camped elsewhere.
2 - Found a deer skull out in the middle of a (recently) frozen over
lake/pond. Major snow the night before, and the skull was sitting on top
of the fresh powder with no tracks anywhere I could see and no other
3 - Woke up to a squirrel literally nailed to a tree outside my
shelter. I had made camp late and tired and in dying light, so I might
not have noticed it the night before, but I think I would have, which
means it happened sometime while I was asleep.