Assuming the schedule will be similar to past years the ferries (passengers only) do not start until mid-April and then are only twice a week for a few weeks. You can get the train to Trieste and then a bus into Croatia.
-:- Message from TripAdvisor staff -:-
This topic has been closed to new posts due to inactivity. We hope you'll join the conversation by posting to an open topic or starting a new one.
To review the TripAdvisor Forums Posting Guidelines, please follow this link: http://www.tripadvisor.com/pages/forums_posting_guidelines.html
We remove posts that do not follow our posting guidelines, and we reserve the right to remove any post for any reason.