We spent some time at the Dargaville Museum. Motorhomes can park overnight and it would be a good spot to see the town lit up at night (though you'd miss happy hour at the NZMCA Park down by the river!)
This is the overnight parking area.
I am always awed by this ancient carved post that was found in the sands of the Pouto Peninsula. It would have been very tall (this photo only shows the top part).

