The 9100 might be useful to interface with the camera.
I think the 9100 has variable output attenuator (ie a knob)...
Using the variable output might be the best way to address the camera - and be sure you wont brickwall/overload its input.
But - I also agree with acidjack about recording your audio separately...the camera audio might be good as backup though.
That's what I was going to say. The CA9100 as well as the CA9000 & CA9200 have volume controls that can be used to attenuate the signal going to the camera. Chris has said that one of the reasons for the volume control is to be able to attenuate the signal going to a video camera, if necessary.