Hi, when are you planning the trip, it's important to know because of the monsoon months in different parts of the country.
From Bangkok koh Chang. You can fly to Trad province for 40mins with car transfer from the airport on to the ferry all the way to your hotel in koh Chang aprrpixmafely 1.30 hours.
Ko Samet is probably the best choice if you want to keep travel time to a minimum and avoid flying.
For January Koh Chang beautiful island and some nice beaches, Koh Samet is ok for 2-4 nights and a road trip from Bangkok
I was actually thinking of going to Krabi Town area. Would this be a good place to spend 5 days or so? I'd like to basically relax, swim, snorkel and hang out. Not into partying any more.
Koh Chang and the neighbouring islands, gorgeous :)
Agree Koh Chang, Koh Mak and Koh Kood
Krabi is fantastic but getting rather overdeveloped and in January might be overrun with package tourists. But you can¨t argue with the scenic beauty.