I met the sound engineer today and the PA will be loud enough; which is always good to know.
The day will have a real festival-feel with American Classic Cars, lots of Scooters, food, drink, a Scooter accessory market, Scooter-portrait photography and of course plenty of music; both live and DJ'd.
This particular Vespa is unlikely to be there as I photographed it in Berlin last week. But never mind, there will be others.