There are a few options for the last few days on your 30 days in South Thailand itinerary. If you’re like me and like to be on the safe side, head to whichever city you have a flight out of. This is usually Bangkok, but there are big airports in Phuket, Krabi, and Koh Samui as well.
Option: Koh Tao
One option is to go to Koh Tao for a night or two to finish your south Thailand itinerary. This is a popular next-step for Full Moon Party survivors, and those interested in taking PADI diving courses. Make sure you book ferries to and from Koh Tao early though, because they tend to sell out right after the Full Moon Party.
If you want to spend longer than two days Koh Tao, I recommend reducing your time at the other beach locations such as Koh Phi Phi, Koh Lanta, and Ao Nang.
Beware that Koh Tao does have a nickname of “Murder Island”. There have been some mysterious, sometimes brutal, deaths that have taken place there over the years, usually of foreigners and especially of women traveling alone. Of course most people go there and encounter no problems at all, but it is something to be aware of.