Complex sentence: McCunn had lived five months on the Brooks Range in 1976, and flew in with 500 rolls of film, 1,400 pounds of provisions, two rifles and a shotgun.
Split into simpler sentences: McCunn had lived five months on the Brooks Range in 1976. On this trip, he flew in with 500 rolls of film, 1,400 pounds of provisions, two rifles and a shotgun.