An alternate is to push to the Kaghan Valley that is a 6 -hour push from Islamabad and can be carried out within a weekend (e.g. leaving Friday lunchtime and overnighting in Abbottabad) - but much better to approach three or maybe more evenings if you can. Beware of landslides https://hotbizdirectory.com/listings12848870/5-simple-techniques-for-islamabad