I've lived in central Ohio for the last 17 years. I saw your other post about central Ohio lakes a week or so ago. Griggs and O’Shaughnessy are boat length limited, you picked the right lake. I used to own an Enzo 230. I have surfed behind my Enzo 230 on Alum before, but not often.
I just moved next to Alum Creek State Park, If I walk due East I'll end up at the Marina. My next door neighbor is the most senor Ohio Water Craft Law enforcement officer. I only moved next door three months ago. I have mentioned wakesurfing to him, he understands what wakesurfing is. However, he’s also retiring this week.
I've run about 6 wake surfing championships in Ohio including three National Championships. There’s no way that wakesurfing is illegal in Ohio.
Some New Coast Guard Laws (Not Just Ohio): “The US Coast Guard has determined that float tubes (aka "belly boats") are vessels and are required to have a Hull Identification Number (HIN). Thus float tubes must be registered under Ohio law. EXCEPTION: Float tubes with one air cell are not considered to be vessels, so they cannot be registered in Ohio.
Paddleboards are also vessels according the US Coast Guard and must be registered in Ohio, but they are not required to have a HIN.
Float tubes and paddleboards fall into the "manually propelled" vessel category with canoes and kayaks. Registrations must be carried onboard, and lifejackets must be available to every person onboard. All operating rules and lighting and safety equipment requirements that apply to manually propelled vessels apply to float tubes and paddleboards.”