Hunted the first season in 2012. Did not harvest an Ibex but came real close.
Practice, practice, practice. The terrain does not allow you to get close unless they are being pushed or you are sitting. I would highly recommend a multi pin sight, I used a spot hogg seven pin and was proficient out to 90 yards. Becoming 100% comfortable with your equipment will allow you to shoot longer range.
I would book a hotel in Deming, the mountains are a 5-10 drive from town. The continental breakfast are fast and easy. 5 mins to wake and eat, then off to the mountain.
All areas of the mountain have ibex. They will move from area to area. I would try to hunt smaller herds. I've seen herds with a few ibex to a herd well over 100 ibex with 20+ billies all over the mountain.
Glass before you hike. If you are in good shape you can hike up, hunt all day and hike down, everyday of the season even in the most difficult terrain areas of the mountain.
When glassing, look for movement more than anything. A good spotting scope is a must have. I would recommend spotting from your vehicle until locating a nice billy.
I would not recommend hiking the mountain unless you're putting yourself in position to be on a stalk. Bumping into ibex is almost an impossibility in my opinion. They will know you are there before you know they are there. Their eyesight is unmatched.
Nannies are your enemy. They are the guard dogs of the household.
pm me if you would like additional advice for the hunt.