Wow, cool that it works for you but it's rather strange.
I just tried it now, with an unpowered hub between the camera kit and the "PC" port of the Y-cable while its "PWR" port is connected to the iPad charging brick.
The BSP powers up fine but the iPad still complains about that unpowered hub, like it does whithout it.
Like I said, in my case, simply using a powered hub works fine