Watkins, VIR, Pittsburg GP, Road America, the Mitty Challenge...
A perfect example of a full boat event is Rennsport. Everyone that was invited spared no expense, it's sort of Goodwood for Porsche.
There are maybe a dozen events per year that draw serious spectator support, and those fans of the cars are why many of us do this.
They're the stars. We just drive 'em.
"If you analyse the function of an object, its form often becomes obvious." - F.A. Porsche