You asked about STJ and this is a great start for info:
https://www.nps.gov/viis/planyourvisit/boating-information.htm
St Thomas also is close and easy with some great anchorages and the out islands around STT and STJ also have some great places.

Clearing C&I in St John is easy,no need to clear out --- but also clear OUT of the BVI.
ST Croix is a good 6+ hour sail - but you will not run out of places in STJ and STT in 2 weeks.