Ok Iíll give my thoughts on the bike cams...
Firstly I have them in both my cars and when some crazy old Doris pulled out on me it proved she was in the wrong despite her husband blaming me and saying those magical words ďIím a London barristerĒ as if I gave two hoots about his job!
I donít have one on my bike for a few reasons, I want one thatís hard wired in and has loop record. There is a few about so I may start looking into this soon ish...
I will NOT helmet mount a camera, I been to an RTC where a lid mounted GoPro punched a square shaped hole through the guys helmet, I also heard a rumour that this was what caused Schumacher serious head injuries when he was skiing (not sure if itís true) I can imagine it did.
The other thing is if you have a camera mounted on your bike and bin it, there is a damn good chance that the footage will be seized by the cops and held against you. Especially if itís a serious accident, You simply could convict yourself! I appreciate there is a good side to it in case of accident it can help but it also can screw you.
At serious accidents we now check cars and bikes for Dash cams.
My advice is to get a camera like Stewies and mount it on the bike be it visible or hidden.