Until recently, I haven't been around in a long time. Dug up this old post. Interesting read.
If you want to know about Sonoran Desert muleys, you won't find too many people that know more than Creed. I say "Sonoran" desert muleys because from my experience, they're pretty different than other mule deer. Even "desert" mule deer that live in different types of desert.
I started hunting the desert around 20 years ago. Creed taught me A LOT. We hunted together quite a bit. Good times.
As you can probably guess from my handle, I spend a fair bit of time in the desert. Reading through the different comments, I realized, none of them are wrong. Desert bucks are different than other mule deer bucks but in many cases, they're different from each other as well. I've seen big bucks that roam far and wide, never hitting the same water more than a couple times a month. I've also see bucks that live in relativity small areas only using one water source. I've seen bucks that will rut in the same general area they spend the rest of their lives in but as Creed mentioned, there are bucks that will move many many miles to rut.
Summer seems to be when they're most habitual. I would attribute that to heat and the need for water. Once it cools off they seem to get really random. I've seen bucks hit a drinker one day, then 3 days later show up at another drinker 5 miles away. Then disappear for 2 weeks only to show up at a third water 3 miles from the first one. The one thing that will make any desert muley habitual is man made food source. Theres so much that goes into hunting desert muleys, it's impossible to cover it all in one sitting.
Anyway, if you are looking for a challenge and you want to sharpen your hunting skills, go hunt desert muleys. They take all the skill that's required to be a good hunter multiplied by 10. Couple that with a few years hunting coues bucks and you'll be able to hunt anything, anywhere.