It is not a good idea to stay in Naran and visit Shugran and come back. Shugran is in the middle of Islamabad and naran. So it would be better if either to visit Shugran on the way to naran or on the way back. In my opinion
Day1- Islamabad to Shugran , visit Siri pay a and night stay in Shugran
Day2- Shugran to Naran
Or the other way round
In this way you can save mony and time and your energy too by travelling less