Free: Contests & Raffles.
I got a no. 4 and a no. 10. Both in January so it should be good hunting.
There's are ways to shoot limits there when it's frozen solid. Trust me, I had the only open water blind one day and watched guys across the pond shoot limits on the ice. They do it often and have the system down. Unlike the RNT gang that run their competition routines all morning long.