Night Watchman,
Good points, well made. I can see where you think that an inexperienced pilot might feel pressured to stay at work - you can probably see where this line of argument is going to go re experienced, 60+ years of age pilots! We have nothing left to prove, and we too look forward to getting home to wind down after a hard day.
I would also expect that a SAR crew would be up there with the very best of the aviation community's CRM practitioners - long may you maintain the exemplary standards the rest aspire to! However, you would only be close to the edge of the envelope (note that I'm not including weather, FTL or other crew-related limitations, just a/c) for relatively limited periods in your flight profiles; put 2 pilots into a 135 plus medic/doc/patient or 2 bobbies/full police role and that aircraft is close to its limits throughout the entire sortie.