I've been the last 4 or 5 years. It's a good event, very relaxed.
You can park your bike anywhere you like around the track or, via a tunnel, in parking areas inside the track. A large part of the fun is wandering around checking out the bikes in the carpark. An extraordinary range machines turn up and almost no Harleys. Make what you like of that. You can go into the pits and chat with the riders and mechanics and watch the racing from the top of the pit building. At the MotoGP that is reserved for the very rich or the very famous.
Last year Agostini showed up. He wasn't riding but he was chatting and signing autographs.
Sadly attendances seemed well down this year despite excellent weather. Even more worryingly the commercial supporters weren't there. Last year BMW and Moto Guzzi had big displays along with a few others. This year only Royal Enfield turned up. There were also fewer food and coffee vans.
Let's hope next year is better.