There is good airplane connection with the International airport Dubrovnik ( 5 km away).
You can come with the bus to Dubrovnik and then 18 km from there to Cavtat ( regular bus service every 30 minutes).
There is Interantional ferry port in Dubrovnik and then you can catch the regular boat connnection evry hour from Dubrovnik to Cavtat.
But the best way is to come with the car or rent a car. You can leave it on the main parking place and we arrange free parking place during your stay.