Our family doesn't mind a long jolly, one of my favourites (that someone else did) was into the more restricted bits of Papua: Cannibals & Crampons (2001)
In 2001, two British ex army officers set out to climb the unscaled face of Mandela--a remote mountain rising 15,400 ft. above the jungles of New Guinea. This is the extraordinary story of their trek through some of the world's most unexplored terrain.
It also makes my butt hurt just to think about.