The two year olds and any infant on up should always be strapped into an FAA approved restraint (car seat) on the airplane. So you will have them whether you need them on not in the BVI.

If the weather ever gets rough anyone who cannot swim and cannot respond fully to adult commands is strapped into a car seat on our boats. Holding small children and infants in never ever safe when the going in the air or water gets rough. Make sure the restraints you have are stamped with the proper FAA approval. The flight attendants regularly check.