Arrive BKK/DMK, take airport rail/taxi to central area (Sukhumvit or Riverside) and check into a budget hotel (3-star). Good balance of comfort and price.
Railay offers half-day climbing introductions (book with reputable operator) or enjoy a spa treatment in Ao Nang; activities generally available 09:00–17:00.
Lunch provided on the raft; explore emerald water by kayak and walk jungle trails on nearby karst islands. Activities run 09:00–16:00 and evening wildlife spotting.
Travel back via minivan to Trang or Pak Meng pier to catch boats to small islands; schedule dependent on operator — many ferries run morning and early afternoon.
Use this day to move earlier or later depending on ferry schedules, weather or if you want to add Koh Phi Phi despite cost — otherwise relax and prepare to leave Phuket on 01/12.
You noted you leave Phuket on 01/12/25. Do you mean you depart Thailand that day, or you continue traveling within Thailand? Please confirm — options after Phuket include: (A) Fly to Bangkok and continue domestic travel, (B) Fly to Koh Samui (Gulf islands) for the second half of your trip (Dec 1–13), or (C) stay in Phang Nga / head further south (Koh Lipe) or back north. Tell me which you prefer and I’ll finalize Dec 1–13 plan tailored to budget and private rooms (no hostels).
I paused detailed planning after 01/12 because you asked for the 'in between bit' — please confirm what you mean by leaving Phuket on 01/12 and whether you want to: continue in the Andaman islands, move to the Gulf (Koh Samui/Phangan/Tao), or return to Bangkok for other plans. Also confirm nightly budget (e.g., THB800–1600 for a private double room) and your preferred pace (relaxed vs fast).