You will need a good flashlight with a strong (I recommend 200+ Lumens), or adjustable, beam.
1. Start at the posted coordinates.
2. Locate your trail guides (A pair of Fire-Tacks). If you have never hunted Fire-Tacks before then I highly suggest you read up on them since their Retro-Reflectivity can be a little peculiar and allusive.
3. Head off in that direction.
4. Follow the chosen path and keep an eye out for each "Solo" Fire-Tack along the way until you reach GZ where you will find another pair.
You will not have to leave the path in order to follow the Fire-Tacks, or retrieve the container.
I'm not sure if there are any other Night Caches in SCV, but we definitely need more of them.