I was just up there as the front rolled through, out in the middle of a downpour fishing like a b0SS :fuckyeah:. Oshay is probably one of the best Crappie lakes in Central Ohio, maybe even better then Delaware. MONSTER slabs up there are common, right through summer, I think there was just a post on OGF about someone getting into them real good a few days ago.
And I hate boat-fishing for the exact reasons you describe, finding where the fish are at can take all day, and even then once you find them you have to identify a presentation that they will hit. I know for a fact alot of guys will troll right out infront of the dam for them, thats where I got mine. Like just to the east of the dam there is a nice flat, then it drops off to deeper water, they like to hang on/around that dropoff and ambush baitfish.
Alot of guys will hit the points this time of year up on alum, that or identify shallow flats adjacent to deep water (with your depthfinder), from what i've heard S-eye/Musky will hang in the deeper water during the day and then come up on the shallow flats to feed later on in the evening.