The first stage of this multi should not be too tough.
The posted coordinates will take you to the parking and also a Metroparks trail kiosk.
On the large photo posted on the kiosk, look for the # of the bottom-most rowboat.
Enter the number, in numerical form, into the checker below.
If you are correct, you will be given the coordinates to the final which is on the Buckeye Trail.
The park is open until 11 PM.
You can validate your puzzle solution with certitude.