We've always gone in early November, and now that our kids are in grade school, we've been going during Jersey week especially so we only have them miss Monday thru Wednesday (3 half days), instead of a full week of school. We also always loved Disney in November - great weather and low crowds. We did notice last year that it seemed more crowded than we were used to, and we even commented to one of the CMs, who said they thought it was more crowded also, however they felt it was less to do with Jersey week and more to do with people pushing off their fall vacations, due to possible hurricanes. He said that September and October were really dead and that it seemed like everyone waited until November to go.