Rowing in the fog adds an extra dimension of enjoyment to the rowing experience. I would not attempt that kind of adventure without GPS. The oppotunity for rowing in the fog does not come often on Lake Livingston. I have been living at the lake for 4 months and that was the only day of dense fog. Maybe in the fall when things cool down (it was 100 degrees yesterday), the fog will return.
It was not an "epic" journey in the sense of skill, risk, and pucker factor. One of my epic journeys in the fog was sailing a Tornado catamaran on Lake Ontario. That was years ago, long before GPS. I was sailing a couple of miles off the shoreline when the dense fog rolled in. Other than the wind direction, I had no guidance as to what direction I was sailing. After a couple hours, the fog lifted, which was a big relief to me.
Now I row more than I sail.
Keep both oars in the water!