I don't live near the lake but make trips every year. Last year I was only able to fish for 3 days (march 26th-28th). It was in the 40s and 50s the whole time and they were in 7-10 ft on riprap.
For numbers try lipless with red on it. If you want big bass and it is cold use football jigs on the riprap. 1/2 or 3/4.
From all the reports I heard last year that was the only bait catching bigger bass. I caught 5 fish for 25lbs in an hour and a half doing that. It can be slow at times though.