Great mule deer can and do come from every unit in Arizona. Historically, the state of Arizona has produced excellent trophy mule deer, statewide. The geology of Arizona is such that an eye-popping buck can come from just about every unit. With that said, some units are better than others, but a trophy buck can be killed during general rifle seasons if a guy knows what he's doing or goes with someone who knows what they're doing.
On another note, Arizona's unit 12 and unit 13 hold the greatest number of overtly large mule deer and that region of Arizona is probably the best place in North America for an average guy to actually kill an unbelievable buck that would far exceed just about everyone's expectations.
I've hunted and/or photographed mule deer just about everywhere they occur on the North American continent and the units in extreme northern Arizona seem to hold the highest percentage of extraordinarily over-sized bucks.
