Interesting posts but what is the likelihood? How many "complete engine failures with no chance of a restart" are there? Has anyone ever calculated a probability of failure based on worldwide statistics? You could then halve that figure to split between day/night then halve it again to account for the fact that most of us are in the pub for last orders!!
In ten years of ATCOing at a busy GA unit, I've only ever encounterd 2 'complete engine failures' and we've handled about 800 000 movements during that period.
IMHO the most dangerous part of SEP night flying is driving to the Airport