Itinerary looks fine. Consider cycling over the Crown Range with the leg from Wanaka to Queenstown rather than taking the low route. Also look at a day trip into the Nevis Valley if you have mountainbike style cycles. Climb up from the Cromwell end.
Thanks all - sounds like you've been there. Accommodations are actually all included & booked with the tour company organizing the trip. Only problem is getting 10 people to sign up as a minimum. Didn't think it would be an issue but apparently not everyone is able to go in this economy. (I don't care if I have to sell my house, I'm GOING anyway.)
SO - if you know of anyone who is interested, please send them the website!! Thanks.