Transfer from Phuket to Krabi is about £50 if booked online prior to arrival, for a private air-conditioned car, so it's not too painful (I did this recently on my trip to Railay)
EDIT: On a more important note, Phuket immigration was 45m-1hr long.
Last edited by FlyingGames; Jan 3, 2015 at 10:03 am