Not only are weekends busier (in ranking crowds on a scale from 1-10, weekend crowds are typically 2-4 ticks higher), but as a PP mentioned, holiday weekends can show a dramatic rise. (Case in point: on our upcoming trip in November during the week prior to Thanksgiving week, we anticipate crowds of about 5-6 on the first weekend, 2-4 from Monday to Friday, and than a dramatic rise to 8 for the weekend we're leaving, as the Thanksgiving week crowds begin rolling in.)