I grew up fishing on Herrington and have fished more night tourneys out of Gwinn Ilsland than any other place in Ky. You say you have a 20" boat which means you more than likely have a hot foot. This makes it easy to use a hand held spotlight. Drive with one hand throttle with your foot and light in the other hand. This is all I have ever run. The big thing for me is that with the hand held light I can shine it toward the bank as I'm running to keep a safe distance away. Two, if you've ever run down the lake and shined the light down at the water it will blind you worse than on coming brights. The hand held allows me to hold it just the way I want it across the water. You can also use it to find the particular part of the bank you want to fish. Plus, it requires no drilling or adjusting on your boat.

Holtzclaw