This is a wonderful place to visit, full of gorgeous vistas, hiking opportunities, and many chances to just sit back and think about what a structure like this means.
As I remember, the gravel road we took to get to Chaco was long and bumpy, but not outrageous. They have a nice visitor's center that explains a lot of the history of the area and Chaco itself.
Bring water with you - and a camera and journal. I would love to return and camp there - to witness Chaco at night would be amazing!