You will need a passport! Check the expiration- It needs to be valid for 6 months from your travel dates.
March is supposed to be a great time to visit Punta Cana with warm weather and low rainfall. You can expect highs of 80-85 degrees during the day and lows of 70-75 at night.
The ceremony and cocktail hour will be on the beach. Dinner will be in the open restaurant but covered.
Beach Casual/Cocktail. Light and airy materials like linen or cotton. Please feel free to wear what you will be comfortable in.