If not travelling from Koh Mak I would skip past Koh Kham island. While it is beautiful, soft white sands, warm turquoise waters etc, it is also a far reach from most other islands in the area and has little going on. Pristine beaches are in abundance in this region, try Koh Kood, Koh Wai or Koh Mak. On our visit we arrive from Koh Mak to Koh Kham finding no more than 8 tourists, sipping Pepsi and Chang beers, looking a little awkward. While Koh Kham maybe nice to relax or sunbathe for exploring it takes no more than 20 minutes. We stay little longer.