Sounds like you had an awsome time
I was in queenstown a month ago 2 and had a wiked time, i think you done the right thing hiring a car, we got the bus packages and out of 7 buses 2 broke down with burnt out clutches and most of the time were late getting to our accomadation.

My favourite was Cardrona, loved the terrain park with all the rails and massive jumps, great watching the good guys and the black runs down the middle of the resort

thick powder

gotta be so careful with the cars we were driving from christchurch to queenstown and just before dark the black ice came out and we went off the road lucky we didn't hit a tree

and i recommend get to know your chains before you get the hire car, took us 2 hours in -10 to get the bloody things on.
and in queenstown you have to get a FERGBURGER

also wish the fields had accommodation

General