An interesting scenario, but one flaw: while you may not be able to see assassins, you can see ships.
you can also jam transmissions. You can also hide in the debris fields. The republic could very well be sending scouting parties through the debris fields to make sure nothing leaves, your blockade, board one and fly back... mm, quite fun. It could be interesting, the shuttle could feign as debris, or it could be investigated by those just far too curious, or Traya could be aboard and manipulate the crew's minds.
And if the ships are not close enough to the debris field, then they are not scanning and Beni's scenario plays out.