Those that aren't are unsuitable for the wet season. There are orange and white air-conditioned buses which serve terminals in city centres. Seats must be booked in advance. Shared taxis operate and are available to all parts of the country. IDP is required.
Insurance is required by law and a customs certificate is needed.
Most people are friendly and hospitable. It is illegal to change money on the streets. Beach-wear should not be worn away from the pool or beach. Conservative casual clothes are suitable. Ensure you do not photograph anything connected with the military.