Mountain Flying in NZ
I can recommend HeliFlight Wairapa who are based at Masterton in the North Island (about an hour North East from Wellington.)
I went out in a 300C and did some mountain flying in the local ranges- very impresive and miles better than Snowdonia. (No fast jets to worry about either!!!)
I believe they have an R22 as well if you are so inclined!
Fly Safe.