Guys, the crew bunk should be placed behind the cockpit with two seats certified for TO + Ldg. This should be mandatory requirement by all regulators, no matter what aluminum it is berthed in.....
Anything else is NOT best practice (as not to say unsafe) - it's as simple as that!
The whole question turns around two factors:
a) How much of a distraction is the augmenting crew with it's presence in the cockpit
b) how much value is the augmenting crew in case of a emergency.
to a) In my view they are a distraction during normal ops on ground, especially with a somewhat assertive augmenting captain. It is imperative that the operating captain can have the cockpit to his team only and therefore some seats must be available for the augmenting crew.
If not, the company bears co-responsibility to more distraction in the flight preparation phase.
to b) my view is, that in any case of added workload, especially with emergencies inflight, the augmenting collegues are of immense value, remember the Sioux-City accident.
Stowing away this asset into the rear of the aircraft or another remote area, effectively making an access to the cockpit impossible in emergencies, is a deliberatly poor set up and very poor sop by the company. They would have to bear some responsibility if an emergency turns ugly and would have possibly been improved by assistance of able bodied additional pilots.
safe flights
GMDS