Walbash river trip

We plan a boat sightseeing fishing trip, on the Wabash. Our boat will be a fiberglass with a fifty hp motor. It probably needs 3 to 4 ft of water to safely use the motor.

This boat is on a trailer and needs a good cement boat ramp to put in and take out.
We would probably need to take 2 trucks so we could spot the one with boat trailer downstream.

Looking on the internet it would seem that Lafayette would be the furthest...