We are headed to Beaver Lake for some R&R in a few weeks. I need to rent a boat slip at a nearby Marina. My boat has an 8 ft beam. The only slips available are 20x9 and 20x16. 9 ft seems a little tight and the 16 ft seems really wide, but you take what you can get. Leaning towards the 16 ft wide one since it gives me more than 6" on each side. Does that logic sound correct?