when I want to go to an exhibition in the Louvre, I always go in the morning, even without a ticket, take the entry through the shopping center under the pyramid and not the entry through the pyramid itself, and I buy my ticket at one of the ticket machines, where there are seldom queues .
And most of my visits are in November when the weather is still good, and I stay overnight on the camping site in the Bois de Boulogne.

Marc