Railway Enthusiasts Society has operated rail excursions around NZ since 1958, some steam hauled using rolling stock from Glenbrook Vintage Railway which it established in 1970's near Auckland. See www.railfan.org.nz
Mainline Steam Heritage Trust operates steam specials throughout New Zealand from depots in Auckland, Wellington and Christchurch. Each year an inter-island Steam Tour attracts fans from around the world. For more visit www.mainlinesteam.co.nz