End of the line, Grand Harbor Resort Marina. After being on the hook a lot lately, a visit to Grand Harbor Resort Marina, located where the Tennessee, Mississippi, and Alabama borders come together (we're officially down south at this point), hit the spot. It has all the amenities a long-distance boater appreciates including a well-stocked ship's store, an elegant boater's lounge, laundry facilities located right on the dock where you can sit by the water as you wash and dry your clothes, they also have several loaner vehicles and they almost beg you to use one to explore the nearby…