Probably near 35? Casting in a little back bay when I was a kid from the shore, threw up on the ice and dragged it off, fishing open water that melted between the ice still in the middle, and shore. Caught a bunch of largies, most around 12 inches, but still was fun and really early. Caught them mostly on floating rapalas reeled really slow.
As far as big largies, I’m not really sure.