The first strip looks a bit like Buka - but I don't think it is.
That photo of Kegl Sugl must have been taken well after I used to fly in there, as the strip surface looks far better than it was in my day. My recollection is that it had a series of drains filled with crushed rock arranged like chevrons across the strip. (I have a photo of it somewhere). You needed most of the strip to get airborne, although the gorge at the end of the strip plunged thousands of feet down, so we could always take a good load out of there, despite the high density altitude. You could just drop off the end of the strip and turn right to go downhill to Chimbu (Kundiawa).
The strip surface was quite rough and it was always a relief to get the wheels off the ground on take-off to stop the aircraft shakes and rattles.....