Oh my gosh! I had one that looked exactly like that, although mind did not have the military-style bumpers. I haven't seen one in ages. Mine was a 1965. It suffered a collision in 1972, I think it was. But you should have seen the other car.
Head liner is going to be made of tent canvas with an old world style map of the world painted on it. The Americas will be above the cab and the rest above the tub. If not, something along the lines of African mud cloth.
... turn off the TV, put the laptop down and get out there ...
Somewhere I have a photo of one of my uncles in almost the same pose, sitting in a chair outside a log house (Not a cabin, mind you!). He is holding a child. The shirt was different but the breeches, the wrap leggings and even the cigar are all there.