No immigration lines any more. Take a taxi. Get one outside the terminal. There are signs for Taxi Meter. They're cheap and it'll be 6 am on Sat, so no traffic. Maybe eat breakfast on the river deck at the Mandarin, Shangri La or Royal Orchid, check out some tourist brochures, and wait for the nearby attractions to open up. Ask the concierge what boat to take or about tours. Massage is cheap, so maybe an hour traditional and an hour foot at Wat Pho, since she has to check out the reclining Buddha any how. Chinatown is nearby and quite interesting to walk around (not so much if it's broiling hot ). Siam (high end) and MBK (bargains) are easy to get to if she wants to shop (Siam or Nat Stadium on BTS). BTW rainy season is coming up soon so plan accordingly. wj