As a long time resident of the Big Island I suggest you take one of the shuttles in and out of the valley. Let them get you in and out safely. Or, it's possible to walk, too- if you're in good shape.
Regarding the foto, I must say it's not only beautiful, but it somehow really evokes the feeling of Waipio as the sun disappears. Waipio is a Valley of the Kings. In Hawaiian mythology, Waipio holds a place not unlike the Christian Garden Of Eden.
Well done !
Richard