your group should be fine! Just tell them they should stay in a group for maximum safety, especially after leaving a club at 3:00am!

There are no poisonous snakes on the island. We do have scorpions and a variety of spiders but nothing they really need to worry about unless they are staying WAY out of town in very rustic conditions. Crocodiles are around, no swimming in the lagoon at 3:00am after leaving the club! Chances are, they won't even see a croc.

Might see some passing rain showers in June. Nothing a 18 or 19 year old will care about.

I'm sure your kids will be fine! If you are very worried, have them rent a cell phone when they get here so they, and you, can keep in touch.