Camp Ashpit was the refugee camp that the Sullivans came upon on their way to Wright-Patterson. It was where they stayed up until the wake of the 4th Wave when Cassie was separated from her brother Sammy and her father was killed. The camp was destroyed by Vosch and his fellow Silencers when they used a detonation device called The Eye to level it with the hopes of also catching Cassie Sullivan in the blast.
The exact location of the camp is unknown though it is a number of miles away from the Wright-Patterson base. The camp is in a deep wooded area that is surrounded by a wooden fence and has some watchtowers. There are cabins on the inside for people to live in as well as tents set up as well. Close by the camp is a special pit where they put bodies of any of their dead.