I think it is still rather inarguable that "the Valley" as you call it (which valley, exactly?) has more trashy people, percentage-wise, than Anchorage.  I have worked many local bazaars, for example, in both Anchorage and the Mat-Su area, and I've consistently found the Mat-Su crowd to be significantly ruder, less polite, and more disagreeable to deal with in general than people in Anchorage.  And living in neither location, I feel I am a fairly objective observer.

In fact, I as a vendor have given up dealing with any Mat-Su bazaars at all for that very reason, so unpleasant have been my experiences with that crowd overall.  Naturally, there were many nice and decent people as well, but the ratio of rotten apples were high enough to spoil the entire barrel, at least for me.  Your mileage may differ.