A friend and I, along with our 9 y.o. sons, fished from his boat on Shenango on Monday (4/29). We found some in 8-11 feet of water near brush piles on the main lake, but did a lot of moving around before we found a consistent bite. Mostly dinks though, with just a few slabs. Water temps were about 53-56 that day if I remember correctly.
FWIW, neither of us are real familiar with the lake, so if you know what you're doing there, you'll probably do better than we did. He used to fish there as a kid 25+ years ago with his dad, and it's only the second time I've ever been there.