I rekon that's it, I actually said to my missus at the time that I'd like to go back in low season when it was less busy, that was in 2010 so not long after you. Mid Jan is as busy as it gets in Thailand.
I think it must depend on when you go. When I went it was full of pissed up aussies, that was mid jan a couple of years ago.
*Edit* I'm not trying to put anyone off because it's an amazing place and there are quieter parts, but in peak season they do cram everyone onto a small island and it...
Bit of both. Ao Nang beach is the main bit in Krabi, there's noting to do or see in Krabi town. There's a decent beach there (Railay beach) and if you get bored and want a proper chill out in high season you can get a direct boat to Ko Lanta which is awesome. Or get the boat to Phi Phi if you...