In my experience with boating at night, out on the open water you can actually see pretty well without a spotlight. Although that is dependent on conditions too. Obviously on a clear night with a full moon, you will see much easier than a night with heavy over cast. Nighttime boating is also easier when you are familiar with the water body you are on (where there are buoys, markers, rocks, etc.). Regardless of how well you can see, if there is a boat or other obstacle that is not lit, they can sneak up on you pretty quick, especially if you are going any faster than a slow troll. A spotlight can be very helpful, and almost a must have, when it comes to docking at night. Unless the boat already has docking lights, or you are always docking in a well lit marina. I'd say to bring it with you and see how it goes. Better to have it and not need it, then to need it and not have it! Either way, when boating at night BE CAREFUL. Cheers and good luck!