From the mainland, Trang town, taking the local ferry for Kok Mook at Kuan Thung Khu pier, costing 250 baht all up. If you're coming to the pier on your own, the local ferry departs at 13:00 and costs 100 baht. It disembarks at the main pier off Ao Kham on Koh Mook where you can catch a sidecar motorbike taxi to the hostel. Just ask the driver to take you to Koh Mook hostel.