Hey Jess,
First of all: I'm a human being rather than a car. And Timmy... well, I'm not sure.
Secondly, as you may know, I live at Welly South Coast (just moved into the marine lab...), which means that Hunter Carpark is not quite on the way to the Red Rocks for me.
The seal colony is coolest from under water (not only literally), so how about grabbing some wetsuits, snorkel, mask and fins and play hide and seek with NZ fur seals? (We may have to go a bit further round for that towards Karori Rock.) A second attractive thing in this area is either mountain biking or a loop walk from Owhiro Bay (or, alternatively, the wind turbine). Fairly easy, I've done that with Tevas once.
Hasta pronto,
Nicolai