Slovenia/Croatia honeymoon itinerary suggestions

Hey, my wife (32f) and I (32m) are planning a trip to Slovenia and Croatia in early September. Our itinerary is to fly into Ljubljana, rent a car and then 4 days in Lake Bled, drive to Plitvice Lakes for 1 night, followed by 1 night in Split. We'll then drop off our rental car and ferry to Hvar for 5 nights before ferrying to conclude our trip in Dubrovnik (3 nights) for our flight home. The rental car and hotels are all we have booked so far.

We'd love to hear your recommendations for must-see spots, must-do activities (hiking, swimming, scuba diving, etc), and must-eat restaurants. My wife is also keen on just relaxing by water with drinks and good food! Any general travel tips for these locations would be greatly appreciated as well. Thanks!