The links in the post should give you most information you need.
Ferry from Koh Lanta to Krabi the taxi from Krabi to Khao Lak. Both legs take about 2 hrs so can comfortably be done in a day but consider spending some time in Krabi if you haven't been before. The region is very spectacular.
Taxi price about 3000 baht or shared minivan about 400 baht per person.
We have some pics, maps and stories of our trips to the above locations here... www.bobandjanette.com that may prove useful.
Happy & safe travels
Thank you both for your help
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