Flew into Dubrovnik last august, after collecting luggage the passengers went on the coach and the luggage went in a van! At Dubrovnik port, all passengers got off coach, went through immigration again, back on coach for about one minute, then off again to check in.
I think luggage was bonded on way home, can't remember, but do remember the queue of about 10/12 coaches all from the ship to do the port immigration thing again. You literally walk through a small building, get passport stamped, and back on bus.
Dubrovnik airport coming home had the longest queue for security that I had ever seen, hopefully just last year's problem. Airport was rammed.