Octobers are getting busier and busier, they say. There are school districts in AZ and
UT that take fall breaks... weekends have the Halloween party in DCA... This year, it looks like most AZ school districts are out the week of the 5th-10th. Utah is out for conference Thurs 16th-Mon 20th, but some Utah schools take the entire Columbus day week off.
A good way to check if Disney thinks it's going to be busy is to look at the hours for that day. We're going to be there Oct 12th-16th. Sunday the 12th they obviously expect it to be busy; it's at maximum hours of 8 a.m. to midnight. Monday, almost as busy; 8 a.m. to 11 p.m. Tues, Wed not so much: 10 a.m. to 8 p.m. Thursday, back up to 9 a.m. till 11 p.m.; but there's a Halloween party that night, too.
They don't put the entertainment schedule out sometimes till a few weeks before; don't worry, there will be at least one parade each day, and the shows like Billy Hill and Jedi Training will be there. However the fireworks will usually only run on the weekends. I'm guessing they'll have them on Columbus day, judging from the 11 p.m. closing time. Fantasmic is scheduled to be down for refurbishment from Sept. 2-November 9th or something like that.
All that said, the attendance numbers for DLR are down this year, due to the economy and increased gas prices. So it might not be as busy as it's been in the last couple of years.
Well, that was clear as mud, huh?

Oh, well, hope it helped.