Note that accommodation is much cheaper in the quieter summer months and that organizing your own diving excursions is more expensive than taking the dive packages offered by many hotels and resorts. US dollars and traveler's checks are widely accepted, as are credit and debit cards.
Banks offer the best exchange rates.
There are ATMs in George Town from which you can withdraw cash, either in US dollars or Cayman dollars. It's not a bad idea to take the cash you will need to the sister islands as banking facilities are few and far between. Bargaining is not a common practice. We encourage you to verify any critical information with the relevant authorities before you travel. This includes information on visa requirements, health and safety, customs, and transportation.