We were extremely pleased with our self drive trip. We went to all the places you suggested and more. Was not impressed with the hotel in Siracusa because it was a little out of the way, there was only one elevator and it wasn't working for part of our stay. The traffic in the 2 main cities was quite difficult to navigate but we managed with no issues. It might be advisable to suggest to prospective travelers that a trans pass would be great for highway travel. We were able to visit the whole island and be aware of the various landscapes from mountains to green fields to the sea and beaches as well as the arid landscape. It was a worthwhile experience for mother and daughter team. The food was amazing 😻