Dear u can reach very easily to these places through GT Road. I m talking abt Islamabad, Taxila, Khanpur, Thandiani. U can cover these places in a single trip and this will be a great trip. I can guide u for cheap accomodation (I probably myself be able to accomodate u for a day or so in my hostel room but currently m not sure abt it bcz of my roommate).