What the hell happened at Altamont?

The concert was to take place on Saturday, Dec. 6 The location was switched on the night of Thursday, Dec. 4. Altamont Raceway at the suggestion of its owner, Dick Carter In time for fifty thousand people who were expected to arrive.
This resulted in a mad rush to prepare the unused race track to accommodate a huge crowd. There was not enough of anything. The logistics involved in providing even the basics for a crowd of this size are staggering. Parking, food, water, sanitary facilities, medical help, lighting, sound, stage construction and security were a mess. California Highway Patrol observed heavy traffic from as far away as Bakersfield caused by cars headed to this concert. A runaway train was headed straight to Livermore California.