Disable backup screen display at night?

How do I disable the camera from automatically displaying when I'm backing my boat down a launch at night?
Last night going night fishing, the screen was blinding in the cab and I could hardly see anything.
I've tried turning of the display at night and that works fine, but as soon as I put the truck in reverse, the display lights up with the backup camera screen, even though I had the display off.
So how do I stop the display from turning on at night when I get in reverse?

I could have sworn it was in the same menu screen where you can turn off the screen...   Hmm, I'll have to check if no one else answers...

[just checked] - It should be under Menu button > Display tab > Rear view camera options > then you can deselect the camera

Ha! I'm dumb. It says "Rear Camera Image In Reverse".
For some reason I was thinking that would give me a flipped image, like a mirror image. Lol
Thanks

No worries, glad you got it figured out 

That's pretty funny!