Here..... out west, Southwest AZ to be exact is where your put to the test. I have stalked every animal from coyote, quail, cattle, peccary, horses, people, deer, elk, and everything in between. Even fish with a spear. Every time its quick movement that they see. I never relied on camo but I depended greatly on some type of cover (brush, washes, wind gusts etc). Of course keeping good wind was always number 1. One thing is to slow down and know your quarry. You could read all you want about stalking but its through practice and blown stalks that you will learn from. I have stalked to deer in plain sight to within 25yds by baby stepping every time they put their heads down to eat, doing this I timed their movements so that by the time they had their heads up I was squatting/sitting still. My approach angle would provide at least a 25-30yd shot when they crossed my path of interception. Too bad there wasn't a buck in the bunch, but I did draw and shoot without releasing an arrow. That's practice out in the field.
I killed my best coues buck at 21 yds bedded at 1pm in the hot of the day. I was hunting with a compound bow then but my max range was 30yds. At the last 60yds or so I dumped my pack, dropped off my boots and crept the last 60. Caught the buck snoozing and he died because of it.
As described before Not all deer are stalkable. You just have to be patient and wait for change. Wind, temps, rain, anything to assist in stalking. I love it with a slight drizzle or gusty mornings for still hunting or stalking.
Honestly spot and stalk is by far the most exciting form of hunting. I never did like stand hunting, it works but I love being out in the woods with bow in hand and seeing what's around the corner.