The most convenient way to travel to Krabi is to get a domestic connect flight from Bangkok Suvarnabhumi Airport (BKK) to Krabi Airport (KBV) using Thai Airways www.thaiairways.com or Bangkok Airways www.bangkokair.com . Both airlines operate 3-4 daily flights between BKK and KBV (Flight time is ~1:20hr). Please check with your preferred airline, usually luggage can be checked through to Krabi Airport.
Also in Bangkok is Don Mueang International Airport (DMK). Booking your connecting flight from DMK to Krabi is NOT recommended. It is quite far from BKK airport and could take more than an hour to travel between the two airports.
If you will be attending the Winter School in Chiang Mai (CNX) the week before, there are 2 direct flights to Krabi (KBV). Air Asia website: www.airasia.com
It is also possible to travel by air-conditioned coach from Bangkok or by train + local buses. However, the journey can be quite long (> 12 hours) and may not be convenient for your travel plans.
Ao Nang Beach is 26 km from Krabi Airport. The most convenient way is to arrange the airport transfer directly with your hotel. Airport taxis are also available at similar cost (THB 600-700).
More tourist information about Ao Nang:http://www.travelfish.org/location/thailand/southern_thailand/krabi/ao_nang http://www.aonang.com/pages/getting_there.shtml
Both Korea and Japan citizens do not require visa to visit Thailand (for a maximum 30 days) under Tourist Visa Exemption Scheme. For other nationalities please consult the Thai Ministry of Foreign Affairs website:http://www.consular.go.th/main/th/customize/62281-Summary-of-Countries-and-Territories-entitled-for.html
Please make sure that your passport must not expire within six months of your stated travel dates
If required, please send requests for a letter of invitation to the LOC via email: firstname.lastname@example.org