The palette
Two surfaces, and they do the same work from opposite sides: the water of the loop, and the woodland that lines it. Set them close in value and the peninsula reads as one clean shape lifted out of the page. Set them far apart and you get a ribbon of water with a green edge, which is prettier but says less. We would keep them close. The open ground at the centre should stay the lightest thing on the sheet: it is where the town began.