I would hang out there during grey light then as the sun rises I would get on a high position and try to spot them going to a bedding place in the shade. When they go down you can try to stalk in for a closer shot for when they get back up. I have found they will bed right in the shade of even a single tree or bush. Where I hunt the mulies are usually down lower in the sage flats and the elk are usually much higher. But my hunting is more of a arid dry semi desert location than where you are.