From Sihanoukville there are various companies running ferry services to Koh Rong, ideally get the Cambodia speed ferry which drops you at Treehouse bungalows just a 10 minute walk away from Nest. The other speed ferry companies will stop at both Koh touch village and Longset pier. roughly 20-25 minute walk from Nest. From Longset drop off there is also the option of taxi boat service from the locals. from Koh Touch you can also get moto taxi to Nest for about $5.