Sweatshop
One thing the organisers of the whole event could do is to make more of the helis that do turn up.
WSM has the crowd getting a closer look at the machines. The field used last year was big enough to rope-off 5m of walkway for the crowd to use. And a temporary bridge over the track to facilitate them "visiting" (and us getting to / from machines) would help.
A great day last year (though weather was awful!)
John