All Storage Containers at Twin Falls
The Storage Container is at the start of the camp, inside a house, up a staircase.
The Storage Container is inside a broken house in the back left corner of the camp.
The Storage Container is on top of a lookout tower in the water.
The Ark Chest is at the top of the broken high building.
The last container is at the back of the high, broken building. On top of one of the tanks.