At Rancho Frío (or Station VIII along the trail), this very basic two-story lodge has a total of 14 bunk beds accommodating 28 visitors. There's a small outdoor dining area beside a very basic but good-sized kitchen, a bohio (open-sided thatched shelter) with a few chairs and a number of flush toilets and cold-water showers.
You should pay the Ministerio de Ambiente in Panama City directly.