I recently travelled into the WHS of Tung Yai via the enternace at Songapong (off the 323 Kanchanburi-Songklaburi road). The journey after the gate was 4wd drive only and then with a 32 inch whell clearance. We went as far as Kho Sadeng ranger station where we camped. To get there involved 18 river crossings in 15km. This jouney is impossible in all but the dry season, ask the locals!Largely evergreen mosit hill forest with Eleocarpus dominating the river banks. Many birds can be seen paricularly in vicinity of the river system. But we have touched only a small part of the sanctuary and intend to return again very soon ( Feb 2013)