Once up at the North peak, you can access many of the temples and navigate through the ridges and passes to the other higher peaks (south peak is the highest at 2160 meters).
There are small shops dispersed along the routes to get water or red bull and even hotels for those who would like to stay overnight and catch the sunrise over the entire area.
After exploring all of the other peaks, you can descend the mountain and exit at the west gate and start your journey back to Xi’an to shower and probably sleep better than you ever have.
As far as provisions go, try to pack light and efficiency bringing only what you need: water, sunscreen, comfortable clothing, a light jacket, food, and the minimal amount of camera equipment you think you would need (camera body w/ 1 standard/wide angle and telephoto lens, tripod maybe).
Happy Hiking!