It's on my to do list as well. I head out to Northern California a couple of times a year, I was trying to time my next trip with this event, but not due to be out there till 24th Sept this time.
I have been following YouTubers "Seen Through Glass" and "The Stradman" who Vlogged from Monterey for the week and it looked like a car enthusiast's paradise, even just walking around the streets and cruising around, that's before even going to the events! Even the car parks for the events would shame the level of participant at most car shows, 918s, 959s, Aventadors and La Ferraris in the car park! Tickets for some events are expensive I gather €600 for The Quail event. But if your going you might as well do it right!