Yes, welcome to the forum
Personal preference as to cash vs. credit cards vs. travelers checks vs. debit card.
Capital One is your best bet for using a credit card and avoiding foreign transaction fees.
We have found that when the Aruban establishments put the charge through to the credit card company in US DOLLARS there is not a foreign transaction fee.
If the Aruban business puts the charge through in Florins, and your credit card company does charge a foreign transaction fee, you WILL be charged the fee by your credit card company, UNLESS of course they do not charge one.
Chart of Foreign Transaction Fees by Credit Card
Updated: March 31, 2011
Cash vs Credit Cards
American Express in Aruba??