Replying to Its all in the timing......

I'm gonna be mainly skiing mt. ruapehu this season as i am based from auckland. (final year at school) But i'm definately heading down south (Wanaka, SnowPark/TC) at some point this year. the big question is when.... At the moment i've got holidays for three weeks in July and then some in september, i'm thinking the best thing to do is head over in July...
I would like to book stuff soon, so do you have any ideas about when would be the best time to go, and maybe cheap places I can stay. (in Wanaka)..
Please Help!!

------I RIDE ARMADA------ S K I N E W Z E A L A N D