Humminbird® and Minn Kota® will release the fourth and final installment of the One-Boat Challenge web series on Thursday, April 9. In the series finale, the two remaining teams get a surprise when a bass fishing legend and another special guest show up to take them on in a battle of who can catch the single biggest fish in just 90 minutes. The winning team earns an advantage for the mother of all final challenges, a treasure hunt that takes…