theriel

Hi, I will be travelling Ao Nang -> Surat Thani -> Koh Tao -> Koh Samui -> Koh Pangan -> Bangkok (spending c. 3-4 days in each place). My 60 day e-visa expiry falls at the time I'm planning to be in Samui. I'm slightly concerned about doing things "last minute", so I wanted to extend a bit earlier, e.g. when in Surat Thani, which has an immigration office. However, when I go to the official visa extention website (https://thaiextension.vfsevisa.com/) , the only locations I can pick up are (roughly) Chiang Mai, Bangkok (and a few around), Phuket and Samui. This makes me wonder: 1. Should I just try to swing by Surat Thani's immigration office, without any appointment, and without any online-filled application, and hope for the best? 2. Given the locations available on the website, should I just limit myself to Samui and re-arrange my plans to ensure that I can visit Samui's office earlier? Thank you for your kind help!