Your best bet may be flying to Dubrovnik in early June (don???t look out of the window when you land at the airport, you will be scared for life, especially if it is windy ??? mountain on one side, water on the other :), stay just outside of it for a couple of weeks and do day trips to Montenegro, Sveti Stefan, Korcula??? Then, rent the car (one way rental) and try to visit Mostar, Sarajevo, islan