I dunno if you watched the film or not, but early on there are scenes showing Melvin Belli, on the phone doing negotiations with some other atty who owned the race track. There was talk of calling judges on the phone to get restraining orders, etc., I thought it was pretty fascinating stuff. Belli was the most prominent lawyer in the country at the time, and boy was that guy smooth.
The times were still naive enough (just barely) to let a free event like that happen, with the Hell's Angel's doing security. It could never happen today. The whole thing was mostly set up on the fly over the phone, as you'll see ...