Many regional theatres will have a video feed for the show and chances are they will have a night vision camera.
One helpful bit of advice if your company is having trouble with the night vision. (I know this only because the theatre I'm at just had issues with theirs and I was left without it for 2 weeks---which was tough since I called things during blackouts while shifts were underway): For some reason, some night vision cameras stop working if infored listening device systems are turned off or repositioned. If your company suddenly finds their night vision doesn't work, see if they've done anything new with the listening device system.
My theatre had moved to a new space, put up the night vision, put up the listening device system, and all was well. The new listening device headphones hadn't arrived, so they turned off the control for the listening devices. Night vision stopped working. I asked them to restore anything they had done or undone to see if it worked again, and sure enough, it came back!
Just a tip to help you all avoid having to guess what's going on during your blackouts!