Karaachi>>>Rawalpindi (No idea about route from KHI--RWP)>>>Abbotabad>>>Mansehra>>>Besham (Your night stay should here, you need to book PTDC in advance there will be huge rush)>>>>chilas (Night Stay/Optional)>>>Gilgit (Night Stay)>>>Cross Ata abad lake by boat>>>Kareem Abad/Hunza (Enjoy Eagle nest, Baltit fort etc),
A day trip from Kareemabad/Hunza to Hooper glacier is recommended.