I don't know about the Ohio marinas, but this spot in Monroe, MI has good fall crappie from what the locals tell me. Heard of a few crappie getting yanked out in the spring too, but haven't gotten a hold of any. Fished at that one in Monroe called Bolles Harbor all spring from the beginning of April to the very end of June, and the biting was slowing down in June. Biting as in all fish, but I was catching quite a few perch there in the spring, bluegills too :D