Found this interview with Sly that preceded that performance - interesting, he talks about what it might be like in the future - the future being 2009...this was in 1974 -
Part 1:
Part 2:
"There is no royal road to this heavy surf-fishing. With all the appliances for comfort experience can suggest, there is a certain amount of hard work to be done and exposure to be bourne as a part of the price of success." From "Striped Bass," Scribner's Magazine, 1881.