Ivory-bill hoax in South Carolina, 1971?

Many people believe that there was an elaborate Ivory-bill hoax in South Carolina in 1971. Here's a snippet from an article with some details:
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Consider the story of Alex Sanders, a political science teacher in South Carolina.
In 1971, he used a "recording" of the ivory-billed woodpecker's "call" to stop the clear-cutting of 10,000 acres of the Santee Swamp, a beautiful natural area near Charleston.

He was a young state legislator back then, and somehow -- he says -- obtained an audio recording of the presumably extinct bird.
He took that recording, along with a local TV reporter and an executive of the Audubon Society, on a boat into the swamp, where he played the recording through speakers.
Then, according to those on board, the ivory-billed woodpecker -- unseen -- "answered" from somewhere deep in the swamp.

That's all it took for the Audubon Society and politicians to swing into action, and soon logging and clear-cutting were banned in the Santee swamp, and the pristine natural area was saved.

The bird was never seen, and many still believe it was an elaborate hoax contrived to halt the clearing of the swamp.
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As I searched the Internet for more information on this 1971 story, I found this:
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Regarding the 1971 South Carolina adventure, put me in the "It was a damn hoax" camp. As one of the suckered ones who stomped around interviewing locals, I can tell you that they were well coached. I'll never forget the little old lady whose last name was also the name of the street she lived on. Every inch of wall space in her home was covered with pictures of birds that had been cut out of magazines & put into dime store frames. I'm talking about HUNDREDS of these things!! She told us about seeing IBWOs flying over cotton fields & other wild places. She was a total hoot.

The best example of total BS was the hunting guide who claimed to have seen a pair at the nest with young. Knowing how many people would pay a great deal of mony to see an IBWO I offered him $100,000.00 to lead me to the nest. He said that he couldn't take me that weekend because he had to go to a wedding, & the next week end was a neighourhood cook-out or some such crap. He never did get back to me.

Well, the Santee Swamp was saved, so in this case the ends did justify the means.
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Of course, there have been plenty of suspected Bigfoot and Loch Ness Monster hoaxes over the years.

I don't suspect a hoax relating to any of the current evidence from Arkansas. I think that Cornell has made only honest mistakes in interpreting the evidence. I wouldn't be surprised, however, if someone else tries to manufacture more Ivory-bill evidence sooner or later.