Replying to Wanaka/Queenstown in August, BIG need of suggestions

Hi everyone
I need your help!
This August I want to go to New Zealand to ski so I was thinking about Queenstown or Wanaka! The fact is, on the Internet I found out that Wanaka is less far from cadrona than Queenstown and has a free transport to the mountain, but that in Queenstown there are more things to do and that it is funnier. Do you have any suggestions?
Another thing, I'd like to go there for 2/3 weeks but I'd like to find a host family, better if with some freeskiers so I could go and shred with them! Any ideas? How could I do?
Thanks everyone!