Steer clear of Fairport Harbor(between Cleveland & Ashtabula).
It's a Hornet's Nest of FAST power boaters all 7 days of the week til about 9-10 pm(after dark), which turns the anchorage into a wash-machine, until the harbor begins to quiet down ... around midnight. You also have to watch the west winds too.
I've anchored there twice ... first time out of ignorance, second time out of stupidity.
It's got good holding(mud/silt) and is quite a nice harbor ... but only after the waters calm down.
Lorain is a really nice anchorage and there's a well protected designated anchorage near Sandusky & Cedar Point(never been there).
Ashtabula Harbor is really nice and Ashtabula has public docks near the bridge(2hr limit ... more or less)