I've been on vacation and I'm just getting around to posting this report.
We fished the evening of the 17th. Couldn't find any fish by the dam so we went back toward mid lake.
Found lots of small schools surfacing but they would only come up for 10-15 seconds at a time. Finally found a big school on two points close to a creek mid lake. Trolled three way rigs along these two points and got a limit very quickly.
Went back to the same spot the afternoon of the 18th and the fish were stacked on the same two points. Caught all we wanted and left them biting.