If I were going to install an electric motor on a drift boat I would get a Minn Kota "Bow Mount" model with the foot control. Since you can get extension cables for them you should have no trouble using it from the rowing seat. This would give you both hands to fight the fish while still giving you control over the boat. I've actually been thinking of putting one on the bow of my sled.

BTW: As with anything motorized... MORE POWER \:\)