vakamalua -
Yes, the whole Halloween Time season begins on September 16th, so you will be at DLR when it's in full swing!
Mickey's Halloween Party begins (this year) on September 30th, so you will miss that.
Have you taken a look at our
Halloween at DLR Superthread? Don't be intimidated by the size of the thread - the key information to give you a good overview of HalloweenTime is on Page 1, in the very first post (the Welcome/Intro post) and the second post (which is the photo Table of Contents). The first post will link you to all sorts of other HalloweenTime-related threads, Trip Reports, blogs, subjects, etc. There are all kinds of photos in the thread of what you can expect to see.
Up until last year, DCA had what was called Candy Corn Acres (you will see a photo of it in the Superthread), which was a giant Candy Corn photo location and all kinds of candy corn 'plants' surrounding the area, as well as candy corn hanging from the Golden Gate Bridge, etc. DCA also used to play Halloween/monster-related music. And there used to be candy corn CALIFORNIA letters at the DCA entrance (until 2009, when they were discontinued).
Last year, when ElecTRONica began and the construction on DCA increased, Disney felt that HalloweenTime in DCA was not necessary, apparently, and virtually all traces of it were removed from DCA. No more music, no more Candy Corn Acres, no candy corn plants, etc. The only thing even remotely Halloween-esque in DCA was some sort of Fall-looking garland over in the Pacific Wharf area. Basically, all the HalloweenTime stuff was centered in Disneyland.
This year, we're not sure what DCA will have. ElecTRONica will still be there, and there is all kinds of construction continuing, so I don't envision that we will see any decorations on a large scale back in DCA. I think the focus will still be in Disneyland itself. There is a rumor of a possible Halloween version of World of Color and even a Halloween-ified Toy Story Midway Mania, but there's no telling if those will ever happen.
In Disneyland, the decorations are really not all over the park. You will see Main Street Halloween-ized, complete with a giant Mickey pumpkin, elaborate window displays and all kinds of pumpkins in windows. You will see pumpkins around the Partners statue. You will see a Ray Bradbury Halloween tree in Frontierland. You will see Haunted Mansion Holiday in New Orleans Square and Space Mountain Ghost Galaxy in Tomorrowland. The Halloween Round-Up in Frontierland is a real gem (full of wonderfully carved, detailed fresh character pumpkins). And you will see character pumpkins above the entry turnstiles at Disneyland. Characters will be wearing Halloween costumes on Main Street (like Goofy as a skeleton, for example, and the adorable Donald Duck as a pumpkin), and there will be a Villains photo spot in Fantasyland. That's about it.
I think that the crowds during your dates will have subsided a little bit from what they will be on opening weekend, and then they will pick back up again when the actual party begins on 9/30.