I've got HUNDREDS of trail cam photos archived that I can post if anyone would like to see them. they're not MONSTERS......but they ARE "mature" deer, and they're nice deer in my woods.

Do they spook at the flash? Sometimes.....but deer will spook at a squirrel scratching.

In "MY" experiences......do they return? Like I said....I have hundreds of images supporting this. Yes. They DO tolerate the flash.