Camp Half-Blood Horror Story

This is a mortal AU for pjo and hoo. So basically the seven and a few others and everyone else go to a mortal camp and one night a murderer sneaks in and starts killing people off but no one can leave because he line the property in mines and barbed wire. But he has a map of the traps so they have to try to either steal the map and kill him. Or steal the map and a phone and call the police.