10/27 – 11/4 (Halloween & Marathon) 11/19 – 11/27 (Thanksgiving Week) 12/8 – 12/14 (Winter) 12/17 – 12/31 (Christmas)
Go early in November before Veterans Day and Thanksgiving and go in early December before the Christmas crowds get there for the cheapest rates.
– 1/2 – 1/3, 1/8 – 1/11, 1/15 – 2/7 (Winter Value Season) – 2/26 – 2/29 (Before Spring Break) – 4/14 – 5/23 (After Spring Break) – 8/16 – 8/31 (Summer Slow Season)
– 9/2 – 9/12 (Summer/Fall Value Season) – 10/14 – 10/24, 11/3 – 11/18 (Fall Value Season) – 11/30 – 12/5 (Winter Value Season)
That means holidays, and breaks from school in the Spring and Summer are when the parks are most crowded.