How to organize excursion to Krabi's cave Tham Klang?

"Tham Klang features the most beautiful stalagmites and stalactites of all kinds that can be visited in less than one hour. Most remarkable are the grisly hair stalactites of one to two millimeters in diameter. Absolutely unique are the stalactite hairs dangling from the ceiling invisible to the unsuspecting eye. Other highlights in the cave are the "Viewpoint" and the "Dome", the small fishpond at the "end" after 45 minutes in the cave, and the myriads of drinking straw stalactites growing from the ceiling 2 to 3 meters in height.
For cave freaks we mention that the cave is said to be 4 hours deep, but such a trip has to be arranged long in advance, best with the guide Gaeng and the cave freak Richard from Khao Lak who are waiting for an expedition to be put together."