My biggest concern with regards to NVG operations isn't any of the concerns brought out by the other posters. All systems are good and will do the job that is required. My biggest concern is the amount of money that will be expended training to an acceptable standard and then more importantly maintaining competency. Notice that I said competency and not currency. NVG use is a highly perishable skill and you can't just strap them on and go flying. Is your company going to outlay the required money for this project fully or are they going to half ass the training and leave the pilots to their own devices? That is the question I would be asking. As for the conditions of the areas you are describing, they sound suitable for unaided operations as long as they have been recce'd during the day. Might want to concentrate on that aspect of the operation vice NVG's.
Former NVG Instructor Pilot.