Route 11 Traffic on Race weekends

[B-Laps]

I've learned in my years in the Lake Region that one should stay away from 93 106 and 140 during race weekends, But since this is my first time wanting to get to the Lake from the Seacoast during a race weekend, how bad does traffic get in Alton on Sunday?

Is it worth trying to plan an alternate route? or will it just be heavy without too many delays.