One thing I might possibly suggest would be setting up camp in Louisville and visiting King's Island, Holiday World, and Beech Bend well there. It is a good central point as all 3 parks are in different directions.
As for Holiday World... you have to really commit to make it work. There are no hotels close to Holiday World so it would involve driving (most likely away from King's Island) for a few hours, then getting back in your car and driving back the other way. If you did Louisville (and Kentucky Kingdom will be open then too,) you could do something like
Day 1- Drive from wherever, check in, Kentucky Kingdom
Day 2- Beech Bend, possibly KK again
Day 3- Holiday World
Day 4- Check out and drive to King's Island. KI
King's Island and Beech Bend are about 90 minutes from Louisville. Holiday World is 70 and Kentucky Kingdom could quite possibly be across the street if you decided to stay at one of the airport hotels.