How can I turn the tables on a prank?

I am going camping in a couple of days and just found out that all of my friends are going to try and prank me with the whole "snipe hunt" prank. Which is pretty ridiculous because I'm not a ten year old boy scout haha. Anyway, they are going to have us split into two groups and one of the groups is going to go back to the campgrounds and dress up in black and try to scare me while I'm wandering around in the woods. However, they don't know that most of the people that will be in my group know that I am in on the prank. I want to turn the tables and somehow scare them. Anyone have any ideas? I'm thinking along the lines of fake blood/serial killer in the woods type of thing.