Following the crash in the UK a couple of weeks ago, the CAA released a safety bulletin, pointing out the danger of installing additional "gadgets" into helicopters (and the distraction this is causing)..
They are REALLY sensitive about these things at the moment...
If your pilots are not able to fly sling load without a camera-think again about their qualifications.
Mirrors and/or window in the floor (or doors removed) should be more than sufficient in a small helicopter like this...