The site is large and the ground uneven — allow at least two to three hours to explore it properly, more if you want to sit and absorb the atmosphere. Wear good walking shoes with grip; the stone surfaces can be slippery, particularly in the mist. There is no transport within the site itself: it is all on foot.
Guided tours are available at the entrance and are worth considering. The official guide association operates from the site, and their guides can provide context about Chachapoyas culture, the significance of specific structures, and the history of the site's rediscovery. A guided tour typically takes two to three hours. Rates are posted at the entrance; agree on the price before you start.
If you arrive independently, maps are available at the entrance that mark the main points of interest. The layout is not immediately obvious, and a map or guide helps avoid missing the more peripheral structures like El Tintero.