if (u have ur own car)
go through Naran/Babusar pass
else
Pirwadhai Bus stand Natco/small coaches
and Secondly , this is too long plan, u would be boared, homesicked, tired etc. if u wanna have fun limit it to 10 days and goto
Fairy meadows
Astore/Minimarg
Deosai
and Shangrilla/skardu or Hunza/Naltar