If you are interested in viewing this and spending some time up there we would suggest booking the restaurant (Restaurant Panorama) up there in advance, alternatively we just brought some treats and water with us, there is a bakery across the road before you get on the cable car at the bottom.

€25euro for 2 way trip

We took a private boat around Elafiti Islands, we used Ado, just WhatsApp him directly +385 98822985, see his reviews below:

https://www.tripadvisor.com/Attraction_Review-g295371-d20267052-Reviews-Adventures_by_Boat-Dubrovnik_Dubrovnik_Neretva_County_Dalmatia.html

He will pick you up from you accomodation and takes about 6 people out in a boat roughly costing €320 for 4hours stopping at green and blue caves to allow swimming.