The Phoenix show is impressively disorganized, I'm lucky to have caught it the one time I did! It's pretty hit and miss and much smaller than the Tucson one. For both those reasons, we only really shoot for the Tucson one.
Here's a link to their website, but it never updates hense my having no idea when it is. :rolleyes: http://www.azreptileshow.20m.com/custom2.html
The online route would be more consistant, imho.