We joined a day tour from Port Douglas to visit the local Habitat, then go up to Cape Tribulation. It is a long journey over a winding road, and rather uncomfortable with all the swinging and swaying of the bus. Lunch at Cape Tribulation was okay, the usual "something" salad and chips. This was followed by a one hour boardwalk tour through a part of the rain forest - the technical information given was interesting but too detailed.
The one hour boat trip on the Daintree River was interesting, especially as there were several large and small crocodiles sunning themselves.
A long day for very little.