This island has been some-what untouched. There are no motorized vehicles....well, just no roads on this whole island. Although, the Cambodian government are looking to start building this area more. I do prefer how natural and un-westernised it is so I would recommend getting there now before it does become just another big tourist spot.
There are different areas on the island to stay at with varying levels of accommodation and owned by different operators. We stayed in the area more known as Monkey Island as this is where the Monkey Island resort operates. On this strip there are a variety of accommodation options but my two favorites were Coco's Bungalow Resort and Treehouse Bungalows (see my accommodation tab). It's hard to describe just how beautiful this place is, such paradise. I'll just let my pictures do the talking.
It is best to try prebook your ferry a couple days beforehand to get the boat time that suits you best. There are two boats out a day, one at around 8am and one at about 1pm. The ferry takes about 2 hours to get across as you are just riding on a slow, basic wooden motor-boat. May take a little longer if the wind is there and there's a bit of a swell....best to have some sea-sickness pills ready just in case. A ferry ticket costs $20 return. Return times from the island is either 10am or 2pm from memory.
We managed to book all our accommodation and ferry tickets through Koh Rong Dive Centre as they operated and owned this part of the island. They were well organised, professional and very accommodating. As the name states you can also book your water activities with them too. This is definitely a great place to unwind and relax for a week or three, if that is what you're looking for.