I think the madness of US Open attendance peaked in 2015 at Chambers Bay. The vicious slopes between holes precluded spectator access, due to certainty of injury. As a result, the crowds were even harder to move about. Doesn't detract from CB as a course, but it does minimize its viability as a tournament site.
In contrast, courses like QR are ideal for spectators, especially at an event like this. If I could attend one USGA event this year, it would be the inaugural Senior Women's Open at Chicago Golf Club. One of the founding USGA clubs, essential arquitectural merit, and the first playing of a tournament. The course is eminently walkable, from all reports, and the crowds will not be excessive.
Tim is correct. In my mind, the Open is an experience, but the other USGA events are a relationship with the course and the competitors.