The only place we felt threatened was on Union Island. Will never go there again, just too dangerous. We sailed in June. Watch out in Mayreau, also. The young boys lay in the sand and make sand angels, all the while checking out who is leaving their boats for the day. Just be aware of your surroundings and you will be alright. Mayreau is an absolute must as is Bequia. Do have a great time, it is a beautiful place, with more shades of blue than the BVIs.