It's like that around here too, but not quite that bad (except in isolated spots). Halloween traffic, though, usually is a [link|http://dc.metblogs.com/archives/2005/11/worst_nightmare.phtml|nightmare].
I'm with you on trying to stay away from the crowds. I'm just picking up some food tomorrow night from Boston Market for Thanksgiving, and I'm not planning on doing any mall shopping for weeks (and not at all if I can avoid it).
Luck with the buggy!
Cheers,
Scott.