Need some really scary campfire stories?

Ok, a bunch of friends and I are going camping this weekend, and everyone kind of looks up to me for scary stories, but I'm running low! I need some tales that will really scare the crap out of them. We're teenagers. And I mean some REALLY creepy, give you total goosebumps kind of stories, because they're hard to scare lol. If you have any that could be told kind of like it happened at the camp we're staying at that would be great, but I'm pretty much willing to take any kind of scary story! Thanks so much for any answers, except maybe possible mean ones.