Get yourself a 1:100,000 Map draw a 3nm circle centred on the runway and find the highest terrain in that area. Add 300ft (Cat B) presto circling area
That would be a nice way to find out farmer Joe built himself a 350' tower last week. I doubt Oz's 1:100000 maps are that up to date, if indeed, they are even as recent as this century.
Stooging around at 300' in unfamilliar territory at night? Not for me.
Gutsy move mav