Here's a simple idea, i havent used it in Aruba, but am going to this upcoming trip this month. I did use it in St Kitts in February.
Assuming you are staying at a resort with a casino, open up a credit line. Even if you dont gamble. Then when you need cash, just draw a marker for $500. At the end of the trip, if you do gamble, and you have the money, pay back the markers. If you dontgamble, or if you do, but have lost, just go home, and make sure the cash is in your checking account. The casino will present the markers (checks you signed when you took the cash) to the bank, and it will automatically come out of your checking account about 8-14 days after you return.

Went to St Kitts, set up a line for $3000 before I went down, and just took $200 cash with me. Paid for meals with credit card, unless i was at the hotel, in which case I signed the charges to my room, same for drinks, and used the markers for gambling, and miscellaneous stuff i needed to buy at the store or whatever.

Even tho the markers and credit line are meant for gambling, there is no rule that says you must use it as such.