The case I got was designed to allow an on-camera flash to be mounted in
the hot shoe. Instead, I put my PocketWizard Mini TT1 there and used
that to control four lights downrange, two together on each of two light
stands. The stands were older, lightweight stands I didn't mind filling
with mud and saltwater- we pushed them as hard down into the soft bottom
of the bay as we could, and moved them as little as possible. Instead of
moving the lights, w'd reposition ourselves, figuring the less I
messed with the lights, the less chances of them going into the Bay. As
an added measure, I put large zip-loc bags over the lights to keep any
splash off them.
While I never took the camera completely submerged during this shoot, it was good to know it was completely protected right at water level. And with the wide focal length I was shooting Robyn at, I had to be right up next to her as she swam by- and into me- to get the shots I wanted. Not having the camera in a waterproof case of some sort was simply not an option.
It took a little longer than usual to get the lighting dialed in, working with gear in bags and waterproof cases certainly slowed things down. But, once it was all sorted out, I couldn't have been happier. And Robyn, of course, was a champ, swimming the same laps over and over and over again, in her Xterra Vortex wetsuit- despite the 90+ degree weather we had that day!
All in all, it was a great shoot, and we were both very pleased with the images we made. Definitely looking forward to the next time I can get in the water to shoot with my new EWA bag!