Wow thanks guys really helpful!
Cassandra - would you mind letting me know what this place is like?? Baring in mind i'm a female travelling alone so don't want to be too far out by myself!
And thanks everyone else for your comments - is all starting to make more sense now. Ok great - so which beach should I be looking to stay on at phi phi? Any recommendations of hostels/hotels? I have to fly back from Krabi on Dec 12th evening. So could do Ao Nang for a couple of nights/Railay for a couple/Koh Lanta and Phi Phi for atleast one night. Is this realistic enough to be relaxing within 9 days (10th day back to Krabi)?
I'm starting to think my 6 day trekk around the north could be better spent on a beach - what do you think? Is it worth doing Chang mai? I want to ride an elephant!
Is it quite the norm that I will meet people to tag along with along the way? Others travelling alone?