Re: Caribbean advice
If the kids have to travel without an adult, there aren't many reasonable options. I think St Thomas is your best bet, with Puerto Rico a close second. But I would check with the airlines to see if they would allow unaccompanied minors on international flights, and if STT and SJU qualify as international for these purposes. I certainly wouldn't expect a 13-year-old to be able to shepherd two younger siblings through immigration coming and going, if anything, anything at all, went screwy.