I've lived in CLE for 20+ years and there's stuff on here I haven't even done haha. Definitely do Cedar Point. It's only an hour from downtown. Avoid going on holidays. Try weekdays if possible. Also, Chicago is only 5 hrs on I-80/90. Take one road the whole way. Maumee isn't bad either, but like the rest of Lake Erie, it isn't very blue. Art museum is top notch.