Daniela's place was perfect for our 2+1 family. The flat is equipped with all essentials including kids' chair. You can park your car at the premises. The sorrounding was extraordinary with olive and lemon trees as well as see side just 3 mins walk. Angelo was there each day and was more than happy to assist us with everything. Our son liked him a lot! He fired BBQ for us and provided us with fresh fruits!
The flat is located outside of Mattinata - you may walk to the city centre but car/bus is recommended. The season ends 15 Sept - at the end of Sept the beaches were almost empty but the weather was still good (~25 deg over the day, plenty of sun, 14-20 in the night). Mattinata is perfect starting point if you want to explore south/east Gargano.
Daniela is a very good host, even if she is not personally there - she collects all informations, texts you asking if everything is ok and is happy to help. She took care to prepare flat for our needs (e.g. provided towels and was in touch with Angelo about our late check-in). Highly recommended!