bro if u r inexperienced in traveling then i dont suggest u live of the land in ur first trip..........
u shud first have a feeler of what u mite encounter ...... make a shorter trip for rece first..
now the sour part .......
in a place where u have all the basic facilities like islamdad to chitral there is no real point in attempting this feat....... u can however do it on trek but u need experience of treking first.....
if ur aim is to reduce costs then just a camp and sleeping bags r enuf for such a road trip......... the only places where u can test urself with such survival are deserted places.......