....... it's all very well pontificating but the reality is that whilst SPIFR may be the zenith of a professional helicopter pilot's qualifications we get precious little practice, little training and dream about a good set of sim sessions to set us up properly. When cost isn't an issue it makes sense to go two-up. Even if all the co pilot does is keep the (up to 12) pax in order during embarkation and more particularly during disembarkation when they have a horrible habit of baling out whilly nilly during the 2 minute run-down despite being told not to. (its my helicopter and I'll do as I want to syndrome).
Two crew is the way ahead as far as I am concerned unless and until we all get SPIFR recurrent training every 6 months in a suitable sim that goes beyond a quick wizz around the ILS pattern.
G.