While we obviously adore all of your kids, we think it is better for you to be able to enjoy yourself freely, so it's best you book your babysitter and back up as soon as possible so you can soak up some sun without a worry.
Given the intimate nature of our celebration and wanting to keep this event small, if your invitation does not say "and guest", then unfortunately we'd prefer if you came solo.
St. Barths definitely can be more casual depending where you are and what you are doing, but for our actual celebration, we would like our guests to dress up a little...so not black tie, but island smart (more of a beachy cocktail vibe).
Since our guests will be staying at different places throughout the island, we won't be able to pick up everyone, as we will be preparing for the event all day. Our suggestion is to rent a car while you are there to explore the island anyhow or take a cab, but if you are in a jam we certainly can work it out- just let us know, a few hours ahead of time.