perisher to charlottes pass is closed between the long weekends so unless you wanna pay to get a cross-snow shuttle you'll be leaving from guthega. you park in the overnight parking area which is around 1km before guthega village, unless you're part of some nsw ski club thingo and get an exemption pass you're not allowed to leave your car overnight in the guthega carpark proper.
buy yourself a perisher 1:25000 topo map.
I don't believe it would be cool to ski off kosciuszko. you can hardly pick it because it's just a nipple in the surrounds for the most part. there are many cooler places to ski off. look at the map.
with a big pack things take a lot longer unless you're an ultra marathon runner/skier so expect to average 2km/h max for the first time.
be prepared for very crap conditions skiing unless you're going to stay below 1700m. the recent winds that were present when the 50cm of pow fell just turned everything into sastrugi hell.
still need to get my photos up from the weekend...