As we noted, we got up super early to 'hit the road'. Our goal is to get to Lake Barkley in four days, so we can spend some extra time there. To do so we need to average 100 miles per day. The boat runs best at 10 MPH, so on the third day we hit it early. Too early. It was pitch black. Deb was glued to the radar as the river twisted and turned. At the narrowest and in a sharp series of turns we ran into two tugs with barges. They shined their spots on us, probably wondering what the heck we were doing out there at that time of the night. Just as we cleared these guys by scooting way over into shallow water, the fog descended. More fun. This was the 2 hours of terror to go with the 20 hours of relaxed cruising. We won't do this again...