Here's my suggestion to you....

Don't go to Neisko it will cost you too much for the internal flight.

Get a flight to Tokyo.
Stay here - http://www.sakura-hotel.co.jp/ it's right around the corner from all the snow shops in tokyo.
Get a 4 day flexible JR east rail pass - http://www.jreast.co.jp/e/eastpass/
Get on train to Hakuba
Stay here - http://www.morinolodge.com/ ask to sleep in the dorm room, it will be cheaper (tell matt, craig and jen I say hai)
Profit