We were there a few weeks ago. Unfortunately we were there in the afternoon and it was HOT! Not fishing, but temp. I saw fish on the finder along the bouy area but nothing was biting. I was already pretty sunburned from fishing at Jackson in the morning so we decided to go home before hitting the dam area.
That had been my only trip to Barr, but I'd expect pretty decent fishing action early in the morning or early in the evening. I also concur with the suggestion of fishing from a boat. The lake is pretty full and the fishing from shore options looked limited.