Had an Aussie mate marry a lady on Lanta so went there a number of times.....
very picturesque but it is there monsonn season same same us here on Phuket, so a lot of resorts are closed, obviously you can still find a couple of resorts open, and prices will be cheaper.
You have to get 2 short ferry rides to get there, across the rivers and these shut down at around 6pm. With all the storms we have been having down here at present, there have been many drownings (see Phuket Gazette online)
Khao Lak now back to normal after the tsunami, they were the worst hit, I will be taking a ride up there shortly to take for foto's of the 2 boats high and dry, would probably suggest Khao Lak to you, as it's closer, and if you have the time, stop at Ranong on the way down, and visit the hot springs, its a very scenic drive/ride.
Below you can read about Tommo's report on his ride Phuket to Ranong
http://board.gt-rider.com/topic.asp?TOP ... rms=ranong