Ko Phi Phi Don Travel Forum

We're heading to Krabi in April for only about a week and want to know if it is worthwhile spending a night or two of our short stay, or three, on phi phi instead. I have mixed expectations from it being a highlight with lots of 'authentic' thai experiences to it being backpacker/tourist-oriented, not ideal for cooling off in the april heat and although beautiful, not much sign of the thai people going about their everyday business.

I also want to know frequently the boats go between phi phi and krabi.