Dear Faisal, I saw a family from lahore and they were traveling on hiace and they went upto sharda. My suggestion is that you start early in the morning (4 or 4:30 am) from ISb and have breakfast in Kohala. Then leave for Muzaffarabad from Kohala and reach Kutton and have overnight stay there. Next day go to Sharda and stay there or you can stay in Kale as well. On 3rd day come back to Kutton and visit Jagran valley on same day and night stay in Kutton. 4th day leave for Islamabd. You can change your plan a bit but i am recomending this as Kids would be accompanying you and long journeys are tiring for them.