I think they always put candy out before anything else. I think that they start putting it out towards the end of the back-to-school promo. It seems that they get some stuff in pretty early though even before that.
I should have written down on my calendar from last year. I need to be there the second the stuff hits the shelf. *sigh* Last year they had the limited edition Star Trek Pez set with the Halloween candy and it was $10 cheaper than anywhere else. I'm not into Star Trek but it was a really nice set and I know the Wizard of Oz coming this year would be just as nice. People have been begging Pez for Oz for years and I know these will be hot. And while I'm looking at Halloween stuff I always hope for other Oz surprises.