The price for private transfer from Bangkok to Hotel on Koh Chang for 4 adults with Minibus Hyundai-H1 or similar vehicle is 5,500 Baht+320 Baht (Ferry Tickets) for one-way and 10,800 Baht + 640 Baht (Ferry Tickets) for round-trip.
It takes approximately 5 hours for each trip include ferry transfer time for 45 minutes. Yes we can pick you early in the morning in Bangkok and late afternoon from Koh Chang.
If you are interested for the transfer you can send your details such as pick-up time & places or you can fill out the forms here
http://www.ikohchang.com/privatetransferservice.htm