What's in a CCK?
Would attaching a female to female usb coupler on the end of a lightning usb cable work as a camera connection kit?
To the second question, No. A female to female USB coupler will not work.
To the first question, I believe a CCK provides what is called a USB Host. This allows you to connect a class compliant USB device. Officially a USB camera so that photos can be put on the iDevice. Without the CCK, the iDevice is only a USB slave/client and therefore shows up as a camera when connected to a PC ( without iTunes installed).