Arrive Christchurch 6th March from Auckland depart 5th April from Auckland.
Have studied a few forums and maps.
Thinking Christchurch to Arthurs Pass/Hokitika (1 night) then Franz Josef-Fox-Wanaka(2 nights)-Queenstown/Glenorchy(3 nights)-Te Tenau-Milford Sound-Catlins-Dunedin-Mt Cook-Kalkoura-Blenheim-Picton and then the North Island.
Maybe 20 days in South Island rest North.
This is the first attempt of route and would appreciate any advice (I'm sure there is some obvious error!!)