Harshly Spiked Key  

 

After you clear the ghost camp, it drops randomly off any of the mobs leading up to and incuding the mobs from the 3rd rest area. If someone(ideally a puller) in the group has the key on them already from a past expedition, you can bypass spawning the ghost camp and the camp after that entirely. After you clear the cragbeast trap camp, have the group move up the pathway just a little bit, stopping in the middle where the path bends up towards the ghost camp. Kill all the mobs down at the bend and have only the puller pull the mobs beyond that bend. The puller should go past the ghost trap and pull the first three mobs from the pathway beyond the ghost trap. Once those mobs are cleared move one person at a time up the hill to the next path beyond the ghost camp where the mobs were cleared. It's very important that only one person moves up at a time so as not to spawn the trap. Once everyone is there, just clear the path above and you'll find that there will be no mobs at the 3rd rest area. You can use this same method to bypass the cragbeast trap by having one person at a time move up past the trap to just a bit above where the rest area is. I've won Tipt from start to finish in 30 minutes by using this neat little trick. Then, the person with key duels someone and leaves the key on his body for future use. Just need to remember to leave the key on a corpse every 7 days so it doesn't rot or poof.