That story was in HOT ROD a year or so ago. They had a lenghty article about that. Some of the trailers had been parked door to door and welded together so you could not get access. In the article the new owner stated that he paid a six figure price for this stash and had been seeking buyers that were offering mid to high six figure numbers to buy him out.
The guy who put all those cars was either very paranoid or eccentric!
Jeff