In message

g, Steve Firth writes

But believe me toting fuel around, filling tanks, fetching gas cylinders
gets to be a PITA. It doesn't seem to matter how you plan there are always
days when you run out and usually at times when all the suppliers are
closed.

That, I think, is the crux of it. However, it has been an entertaining
and educational discussion. Thanks, all :-)
--
Graeme