Itinerary help on Almafi Coast

Hello, My husband and I are planning for a short 8-10 nights in Italy in Ischia and Almafi Coast sometime between Sept 15 and 28. WE are thinking of the following way to fill those 8-10 nights....
4-5 NIGHTS ISCHIA - 2-3 nights in Albergo Il Monster AND 2 nights elsewhere in Ischia (i would prefer one location but would love to experience the Castle stay and 2-3 nights will cost a lot)
4-5 NIGHTS ON ALMAFI COAST (looking at smaller, less touristy areas such as Atrani, Vietri sur Mare, Maiori,Minori.
1 NIGHT NAPLES (pre flight to Dubrovnik)
Our goal is to see the beauty of this area of Italy, On our holidays we look for the same type of places/activities as follows:
-enjoy some quiet (as quiet as possible in September) time on a less crowded beach. We enjoy a private beach attached to a hotel for the ease of using the beach. WE love to swim in the ocean and in a refreshing pool.

-Enjoy wine or coffee on terraces with a view,
-Enjoy transport by water as much as possible - tours, ferries, etc,
-Enjoy a self-guided or guided E bike tour in 1-2 areas.
-Kayaking in calm bays.
-Wander quaint villages
-Enjoy live music outdoors.
The things that we typically do not enjoy on our travels are:
-Crowds
_Touristy shopping areas ( we do not shop much on our vacations)
-Lineups
-Having to book our meals ahead of time
Your suggestions regarding my itinerary or specific areas to stay or specific accommodation (we prefer Bed and Breakfast or guesthouse style accommodation but having said that we stay in hotels often too.- Views and having a private balcony to enjoy those views is usually what we look for) we would greatly appreciate your time and thoughts.
Thank you!.