No, they will not extend the offer into Oct. They extended it only to 10/4 last year and the F&WF and MNSSHP were more mobbed than normal. The dates are only through 9/30/06. Unless there is absolutely no interest in this offer, which I seriously doubt, I don't see them adding addtional dates.
Given the increased traffic they experienced last year from the 4th on, I highly doubt it. That's why they cut it shorter this year. And I certainly highly doubt they'd extend it past Value season and into the second, third, or 4th weeks in October. Many schools get off at some time during those 3 weeks and they don't need it to pick up business.