arghhh... i have driven past this place hundred times and pulled over once to watch. Someone was using the noose technique to pull up a whopper. He took ages getting it up the wall, no idea how long it bounced off the rocks. When he got it up, he said 'Too big', unhooked it and let it fall... I walked away!
Thinking mechanically though.. wouldnt a nice 4ft by 4ft net with rods on two ends (think dolphin cradle) and an electric winch attached to the railing (ie a clamp on boat winch) make things a lot easier and safer there?