If you want a really fascinating (and rather surreal) account of croc hunting, strongly recommend The Eyelids of Morning by Peter Beard.
He was a rich playboy type artist who attached himself to a MASSIVE croc hunting experiment on Lake Turkana (Kenya) in the late 60s or early 70s. They shot thousands, living in ramshackle tents on a remote beach.
My father was involved, generally flying supplies to them. One of the favoured techniques was to paddle out into the water with a .30-06 balanced on a mud smeared inner tube. They paddled up to within 30 yards or so of resting crocs, shot them in the head, waited for the thrashing to stop, and then felt for the carcass with their feet. Balls? Bloody big brass ones.
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