When I did my upgrade and went for my 'command chat' the MFS told me to carry enough fuel I was comfortable with and which would avoid me ever coming back into his office. Pretty good advice from a very experienced pilot. I'm with you framer, escape route plus fixed reserve for high ga single runway airports. There is only a couple of these anyway, and I too have held for that extra 30 mins probably half a dozen times, while others were diverting around me left, right and center. All comes out in the wash and after all the pax'so safety is our number one priority........isn't it.