Thanks for the comments everyone. Tee, I've not been to Horseshoe Bay yet, but a guy who was shooting last night mentioned it to me as well. Sounds like a plan.
Western Guy, on the exposure the EXIF data is here:
Exif | Golden Gate Bridge from Baker Beach, San Francisco CA | Flickr - Photo Sharing!
For me it was less about the exposure settings than it was about getting to the right spot for the first time and after many exposures noticing the reflection in the receding water. It would flare up after the wave pushed the water up the beach and then dim quickly as the water drained into the sand and back down the beach. I probably shot 30 exposures trying to use the changing waterline as a leading line into the photo before I noticed the reflection. Also it got more pronounced as the sun went down and the lights on the bridge offered more contrast. I also had to do some post production on the vignetting I was getting in the lens, the geometry of the bridge towers and I adjusted the light in the shadows a good bit to get the final effect.
Also, and I can't overstate this, the camera body was a game-changer. This was shot with a Canon 6D, my first day with the camera. The low-light performance is shocking to me, almost unbelievable coming from my Nikon D70s. I'm really, really exited about this camera.
I had a lot of trouble figuring out how to manipulate all the settings, and had a lot of fuzzy shots even with the tripod on long exposures. This was one of the few moderately sharp ones, and glad it was the one with one of the better reflections. Still, I have ideas about how to make it better but the sharpness on tripod I could use some advice on if you have it.
Hope this is useful!