Zardoz- our experience has often been that using the nightsun has been what they were after all the time, it gets them all excited.
MightyGem - I thought it was relief pilots who were found partly dressed in your aircraft?
On the incapacity question, if the aircraft has an autopilot with heading, airspeed and alt hold you can at least arrange to crash at low speed and low rate of descent pretty close to an RV point with emergency services. Honest.