We are doing the same itinerary in October. St Thomas it’s easy to get to Maagens Bay, there are shuttles back and forth all day. It’s a nice beach. Trunk bay is beautiful too, but it’s a bit much to get there since it’s on a whole other island. (IMO) we booked the honeymoon beach party cycle boat, something different this time. we’ve never been to Dominica so we are doing the wacky rollers rainforest tour. Barbados we plan on boatyard beach, it looks beautiful. Idk why no excursions show yet! Weird.