We certainly got lots of exercise too...especially since we were going with the flow on the way down and I lost track of how far we had gone. Thanks goodness the current wasn't strong, since it was a long paddle back.
The guys stopped midway back to take a break and swim in a deep section. Dave anchored the kayaks the way a barge does, with a paddle as a 'spud'.
Hopefully we can do this all again before the summer ends!