You could start by elaborating on who you were with and what occasion was it (ie school outing or just school holidays with friends). Write about the local attractions you have visited such as the beach, the village and the delicious seafood dinner you had. You could also talk about a campfire at night by the beach where you played games and sang songs with other friends. End it with your reflection on the trip and how you felt very happy and blessed to have been on this trip.