Jerm,
I see you're going Sept. 29th - Oct. 10th 2004 from your signature. The newest Unofficial Guide to Walt Disney World 2005 has a new feature this year: It actually lists every single day, day-by-day, until December 2005 on which parks to go to on a day, which to avoid, and also the crowd level on a scale of 1-10 (with 10 being the most crowded). Here is what it says your your days.
Wednesday, September 29th
Crowd Level: 2
Best Park: Magic Kingdom
Park to Avoid: Epcot
Thusday, September 30th
Crowd Level: 2
Best Parks: MGM or Animal Kingdom
Park to Avoid: Magic Kingdom
Friday, October 1st
Crowd Level: 2
Best Parks: Magic Kingdom or MGM
Park to Avoid: Animal Kingdom
Saturday, October 2nd
Crowd Level: 2
Best Park: Epcot or Magic Kingdom
Park to Avoid: MGM
Sunday, October 3rd
Crowd Level: 2
Best Park: Epcot
Park to Avoid: Magic Kingdom
Monday, October 4th
Crowd Level: 2
Best Park: MGM
Park to Avoid: Animal Kingdom
Tuesday, October 5th
Crowd Level: 2
Best Park: Animal Kingdom
Park to Avoid: MGM
Wednesday, October 6th
Crowd Level: 2
Best Park: Magic Kingdom
Park to Avoid: Epcot
Thursday, October 7th
Crowd Level: 2
Best Park: MGM or Animal Kingdom
Park to Avoid: Magic Kingdom
Friday, October 8th
Crowd Level: 2
Best Park: Magic Kingdom or MGM
Park to Avoid: Animal Kingdom
Saturday, October 9th [Mickey's Not-So-Scary Halloween Party]
Crowd Level: 2
Best Park: Epcot
Park to Avoid: Magic Kingdom
Sunday, October 10th
Crowd Level: 3
Best Park: Epcot
Park to Avoid: Magic Kingdom
I hope this helps you. I will be there from October 4th-10th myself. If you go to MNSSHP, look for a Ghostbuster - that's me!