Gaunty,
Once flew Mackay - Brisbane (early hours of the morning) in a C441 carrying Dubbo + sixty as an alternate. Dubbo went bad and ATC advised just two available alternates - one required a passport and the other was Hobart.
The replan (Hobart) was a non-event with the C441 capabilities. Great aeroplane in its day. Now did I ever tell you what a great aeroplane the Citation Ultra is...