Thats a real bummer man, over here about 4 hours from me is basicaly the centre of the north island, in a place called Taupo, there was a mint as camping ground right by the lake and right where everything was so basicaly in town.

It used to get full up sooo much over summer etc.
It got closed off or i think someone sold it off not sure.
And its now like just a walk way area or something not quite sure havent been up there for ages.

And now the only play to go is roughly 45min south of Taupo and you have to have a vehicle to get there and back as its on the road leading into Taupo

Such a pain when places like your state parks close

Bit of a rant from me above