Atkins recomends when ever on vacation move to maintanance, that way you can enjoy the vacation and not end up so frustrated you go completely off the wagon

Just stay away from refined sugars and flours for the trip. Eat alot of veggies, go ahead and enjoy a nice curry (It may have some bad things, but not much), and enjoy meats or poultry. You wil probably walk a ton, which will help to burn any extra carbs that sneak in. Visit those open air markets for fresh foods or at least a ton of walking