OK here's 3 suggested courses. They all start at 34deg30'36" 150deg 51'54" anybody with a gps can type that in and go straight there. Someone with a drink bottle and a brick can mark it. The red line is the 50 degree course, the blue the 130 degree course, the yellow is the 60 degree course. They are each 600 metres long ending 250 metres clear of the bank. That should be enough water depth. You might have to start a little off the start mark and come in tighter before bearing away but that's OK. Can't say right now whether there are any obstacles on any of them, but they'd soon get reported if there were.