Ca-Varmonster, I have hunted Mule deer and whitetails for about 65 years, and I have found over the years that mule deer do not move in set patterns like whitetail do. This may be your problem.
Whitetails will pattern on bedding, trails, and food plots, and live and die within 1 mile in all directions of where they were born. Mulies however feed where ever they are, seldom bed in the same area more than one day, and only migrate up and down in altitude in mountain country to avoid heavy snow in winter, and heat in summer. Mulies are rarely taken form a “STAND” but are better hunted by glassing the shady side of canyons from the sunny side but from cover. Mulies never bed in the sun no matter how cold it is.
I find the best way to find Mulies is in mid day in areas where there are cap rock on the shady side of canyons, by walking the top of the cap rock, and looking very carefully over the side to the base of the cap rock, a favorites place for mulies to bed. This is especially good for a bow hunter, because the shots are usually no more that 30 feet straight down. The base of cap rock is almost impossible to see from the bottom of a canyon, but is a snap from above. The key to mule deer is get high, and look down, on the shady side of the mountain or canyon.
One other trick for the rifle hunter is to take a fox /coyote call, and sit in the shade where you can see most of a canyon, blow the call a few times. It will usually bring out any does in that are bedded or feeding in the canyon, now watch the does very closely. If there is a good buck in that canyon he will be bedded away from the does, and when the does are alerted he will try to sneak out of the canyon. When he moves the does will all look at him. Look where the does are looking and 90% of the time you will see him sneaking slowly out, giving you a shot with a scoped rifle!
I was born in whitetail country and when I moved into mulie country I tried to hunt mulies the way I had hunted whitetails, it didn’t work. It took me a couple of years to learn how mulies operate. In the last 60 years I have killed probably over 150 mule deer in five western states, some of them real HOGS! Many think Mule deer are dumb, they are anything but stupid, but simply are an entirely different animal to the whitetail.
Hope any of this helps