Update: January 2016. In 2014 the road to the petroglyphs washed out. It has yet to be repaired. Be prepared to hike a couple of miles if you wish to see them. Additionally you will need a pass to enter Ft. Huachuca, which you must obtain from what is now the Main Gate. We visited Fort Huachuca again in late 2015.
In early April 2013, I drove the back road to Ft. Huachuca from Sonoita to view the Garden Canyon petroglyphs. It's a beautiful drive this time of year. The Fort has 2 fine museums, one related to the Buffalo Soldiers and the other to Army "Intelligence". Today, Fort Huachuca is a very active military post. To get past the guards, you will need your drivers license, car registration and proof of insurance. You may also be required to show a second photo ID such as your passport.
Do get a map of the Fort from the guard when you enter. Otherwise, you will be perpetually lost in this maze.
For more information on the Apaches and the history surrounding the Apache Wars, see our page on the Local History of the Apaches.