I finally was able to do this after thinking about the Harpy Eagle for years. The experience did not disappoint: It was a long day trip from the Canopy Camp where we got up at 4am, took the van for about 9omin, then went on a 3 hr boat ride and finally hiked about 45min to get to the nest. We got excellent looks including fabulous photo ops.
A brief trip report with species list is here.
Pictures are here.