state
registration is not accepted in the french
caribbean. your
boat is not confiscated, you will be asked to leave. there was some talk at one point of fines, i'm not up to date on that.
the
virgin islands is exempt from this
rule as you must have a u.s. address to document a vessel. french
customs will ask if you LIVE in the
virgin islands. it is $5/foot to register a
boat in the virgins and very simple.
dinghy must be registered as well. perhaps easier for you than
documentation.