AllThingsD, which seems to have a bead on Apple’s Fall Event, says the event will be held on Apple’s campus.

Sources close to the company say the demonstration — currently scheduled for Tuesday October 4 — will be held at Apple’s campus in Cupertino, California. Why? That’s not entirely clear. Perhaps the release date was too much of a moving target to risk booking a large space like Yerba Buena Center for the Arts (YBCA), which has hosted a number of big product unveils in the past.

OracleWorld is happening in the Moscone/Yerba Buena area during the October 4th announcement so that could be a reason for the move. Though Yerba Buena, the usual venue for such announcements, isn’t marked as booked.

Also, Apple has much more control over the wireless access at its campus auditorium, something that had caused some issues during the iPhone 4 announcement. With all of the wireless devices in the audience, Steve Jobs had trouble demonstrating things like FaceTime and the improved speed of the iPhone 4.