Grab a metal detector and run it past your nads first - if you get a positive possible 'steel balls' return then you should probably give it a go...!
A lot ageing aircraft up here but some newer and okay machines around. It's not for everyone - that's for sure. Do your homework, do some thread searches here and check out
http://www.pngair.com/ for some pictures. Most operators run crews on tours these days.
Happy homeworking...
Oh, and I would have to disagree with you old fella - PNG is not just as challenging as anywhere - it has some pretty unique challenges which are all it's own...