I believe the North American record is 29.92 by Bob Formosa and Jason Saliba during the Crackle Cup (now Bass Proshop Simcoe Open) on lake Simcoe.
I think it was 3 years ago. Last year they weighed 29.+ as well. There was also one on Erie over 28.50 2 years ago.
As for the BASS northern divisional next year (I'll be fishing it), a 3 day average of 20 should win but there will be some big daily bags. Its a big lake that can really blow up and that will be the determining factor, the weather.