I would stay away form Isle Fourche, St. Barts is Great.
St. Kitts is OK hiking the volcano is a must do , downtown is dreary, but there are some nice anchorages
in the south where all the tourism development is happening see it before it is ruined.
Montserrat is wonderful. ( take a tour of Plymouth)
is also great, stay in English
Harbor. And Barbuda is a must do , pink sand beaches nobody there.
This is too much for a wek though evenr too much for two weeks. Also doing the BVIs on top of this is too ambituous. You want time to enjoy these islands and there is a lot of distance between them. I would sail clockwise starting in St. Martin going to Barbuda and Antigua
and Monsterrat, St. Kitts and Barts. I wouldn't stress too much about customs
they are lazy corrupt and a hassle. If you don't check in nobody will know or care.