I already used the reverse light middle pin for my reverse lights. Here is that thread if you are interested
Yes I could have used it, and I could have just put a switch on the other end of the fuse (the 7way truck connection has its own reverse light fuse) and been able turn the camara on/off from the truck.
So far so good with the illuminated switch beside the ground control panel. I can't see the illumination when it is really bright out though, and it's not the end of the world if I leave it on. I will eventually see I forgot to turn it off.