According to various sources and the Disney website, here's what's been historically true. Keep this in mind when planning your trip.
Lowest attendance:
· January (except New Year's Day) until just prior to Presidents' Week in February
· The week following Labor Day until the week prior to Thanksgiving
· The week following Thanksgiving until mid-December
More Moderate Attendance:
· After Presidents' week in February through early March
· Late April through early June (except Memorial Day weekend)
· Columbus Day Weekend (October)
· The first part of Thanksgiving week
Highest Attendance:
· Presidents' week in February
· Mid March through Late April ("Spring Break")
· Memorial Day weekend
· Mid June through Labor Day
· Thanksgiving Day and weekend
· Christmas week through New Year's Day