The key to creating a great trash the dress session is to try and shoot in bracket mode as much as possible so you can capture the different exposures of both the background and the subject so you can get both.
The picture directly below is real....I didn't just layer or cut and paste the bride into this landscape shot. Using bracketing techniques she really stood in the water and I got this shot. I'm not saying it should be hard to believe....but in this day of photoshop it seems everybody looks at a shot and the first thing they say is, "That's not real...that's photoshopped." I hope you enjoy all the shots from below...and they are real!