My friend Marco and I visited the beautiful city of Dubrovnik for a few days.
While there we used Doria Ltd. to book a Game of Thrones Tour. It rained that day but our guide Robert was enthusiastic about asking us on the tour.
Robert was very knowledgeable about everything GOT but he was also very knowledgeable about his Croatian history as it pertains to Dubrovnik and the surrounding area.
I would very definitely recommend this company and especially Robert for your tour.