Red Sparkey - a word of warning about going Coues Deer hunting - don't do it UNLESS you are prepared to want to go every year! Like others have said it is addictive!
I live in the Southwest and did not hunt them for years. I am an elk nut and just could not see what all the fuss was about. Whitetail hunting has never tripped my trigger, sitting in a tree gets boring to me. Then I had a buddy that wanted to try it so we did and we are hooked! Have gone every year for the last 5 years when we started.
We hunt in the state of Chihuahua, Mexico and it is very mountainous country. It is like hunting 90 pound elk. Lots of glassing, hiking, spot and stalk. The best time to hunt in Mexico is in January when all the other big game seasons are closed. Coues deer hunting in Chihuahua is a lot less expensive than in Sonora (no mule deer in Chihuahua where we hunt) and a really good hunt can be found for less than one would pay for any hunt in the US. Several of the ranches will let you hunt without a guide where you can DIY and we see LOTS of deer, multiple 90"+ bucks every time we go. And yes, it is safe, have NEVER felt being threatened by all the hype about Mexico. There are good and bad areas to be in Mexico, just like in the US.
15x bino's on a tripod is a must and you want an accurate rifle to hit the little guys.
You can go over to coueswhitetail.com and lurk around without joining and will see lots of info on hunting Coues deer.