You have no clue. Camping was out of the Reformed Church which has never been pre trib in their viewpoint. And with a following of no more than 100s if that, he was hardly a leader in any movement
In 2005, Camping predicted the Second Coming of Christ to May 21, 2011, whereupon the saved would be taken up to heaven in the rapture, and that “there would follow five months of fire, brimstone and plagues on Earth, with millions of people dying each day, culminating on October 21, 2011, with the final destruction of the world.”
Camping with his rapture predictions had a following of well over “100s” — Beginning in 1958, he served as president of Family Radio, a California-based radio station group that, at its peak, broadcast to more than 150 markets in the United States.