In the last 20 years, the infrastructure in North Pakistan has seen big improvements. The road network which takes people from the capital Islamabad up along the frontier over the Lowari Pass to Chitral and on to Hunza has been modernised; there is even a tunnel now under the Lowari pass for when conditions mean the pass is closed.
As far as air travel goes, Pakistan International Airlines have taken on a new fleet of domestic planes which give access to the more remote parts of the country more regularly. The country has many international airports including; New Islamabad International Airport, Islamabad (ISB), Jinnah International Airport, Karachi (KHI), Alama Iqbal International Airport, Lahore (LHE), and Peshawar International Airport, Peshawar (PEW) - so you can choose where to start and end your adventure.