Any lake with 2.5 - 3" already SHOULD be ok by then, just drill test holes in shallow water to be sure. Don't go out to water over your head until you drill at least 2 holes. DON'T GO ALONE. Anyone who plans to go alone, message me, id be happy to let you join me. I plan on Conneaut lake if it's safe Saturday, if not, tuttle point would be the next choice.