K2 Climber Mate there are only two seasons in PNG ...
Hot and Bloody Hot.! That said a cool SP as has been said is great...hangovers only come from drinking too much of it.
There are several varieties... Ordianire SP Brownie, Long Neck and Ice, and damn good stuff it is too.
The ONLY way to get a job up there is to pack a bag and get up there and get around and see the operators. As has been said, there are only three main operators. The main one from those is PX (Air Niugini) There are a bunch of smaller operators flying Islanders, C206's, 185's and so on. Great experience if your weather decision making is good. A real bummer if it isn't.
The "Rascal" problem is fierce, but you soon become streetwise and avoid putting yourself in bad situations. Port Moresby and Mount Hagen, Goroka are the main trouble spots, but up country in the villages the people are real friendly. Good Luck