User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-1515612-20130221033240/@comment-5774152-20130224181612

I'm not quite sure why you would think there was a third camp. I mean, maybe the gods prevented whoever left from finding the Greek camp because they were worried about them spilling the beans about Camp Jupiter. They have been trying to keep them apart for a while now. But, who knows, maybe there is a third camp. I just don't see why.