New Caledonia - any suggestions?

Hi,

I am going to New Caledonia for six nights this September. Do you have
any recommendations on where to go and what to see?

I have already decided to focus on the southern part of the island, and
I consider spending one night on Ile des Pins.

I am a keen amateur photographer, so I would be interested in scenic
landscapes. Staying there less than a week, I think any walks have to
be one day only. I am travelling on a budget, but I could spend some
money on a cheap rental car.

I will be thankful for any tip or suggestion

Regards,
BT