We do suggest:

• Always drink bottled water.
• Carry a picture ID/Tourist Card/Travel Documents.
• Take US currency in small bills, you will use these for taxi or ferry fees.  Exchange your currency after you arrive at your hotel.
• Bring your own beach towels and toiletry items.
• Take ordinary precautions regarding your valuable and money.  Use hotel or room safes when provided.

Have a great trip!