G'day Maeroda,
We have only recently started using NVG for helos in Australia. I use mine for Law Enforcement, SAR, EMS (though not actually used it for that yet but we are a backup aircraft). They are absolutely unbelievable in that you can be 500ft above the ground in valleys (even with no moon and overcast) and quite happily see everything. Use of white light out the front also illuminates everything to a better extent.
Go and see your bosses, and tell them NVG is a must for night ops (even pad to pad) especially in that scary terrain from your photos.
Fly safely and hope you get them soon.
Sunnywa