I think it would be kind of tough to super-impose fog, but I guess it could be drawn in, which I didn't do.
The following are the "before" pictures to my finalized HDR photo.
This is the picture at EV 0 exposure:
And this is the Photomatix-processed image, with two duck ghosts remaining:
I then took it into Photoshop Elements and applied two filters in Nik's Color Efex: Detail Extractor and Sunlight (5310K default temperature). I cloned out the duck ghosts and some stickly weeds at the bottom corners. The processing created some noise, especially in the sky so I applied a de-noise filter, then sharpened it a bit with unsharp mask. (Can never figure out why I de-noise and then sharpen?! Oh well, it looks better...) Finally I adjusted the hue/saturation.
Honestly I never was too fond of HDR either and don't want to debate it here, but I discovered that the process opens up tremendous capabilities in photography. Not every photo needs HDR of course, but as you can see in the EV 0 photo, no discernable color is seen at the horizon, the clouds have no tone or detail, and the photo simply lacks life. If looked carefully, the duck's colors are even evident.
HDR does take time, for sure, especially when you are new to the process, as I am. And of course nothing can substitute good lighting and composition in photography...with some luck. Try HDR if you can. It's not that complicated, and it adds to the fun and creativity of photography. Thanks again for the comments.