In the Lonely Planet guide for Australia Daintree is the top #6 attraction. The guide book claims there are (among other things) mountain treks, self-guided walking trails, kayaking, croc-spotting cruises. However, the guide doesn't really offer a decent explanation what exactly is worth seeing there. They point to page 449, which only give some historic background of how the park was established. The chapter seems to be a listing of tour companies, restaurants and hotels arranged geographically, which just doesn't help to choose anything.
Could someone list the most worthy things (that are specific for this area/different from the rest) and how to visit them on a budget?