The Cruin is a private-dining restaurant and wedding venue on the Loch Lomond Castle Estate, with a dining room and lochside lawn/gazebo directly on the water's edge. It's kid-friendly on setting and menu terms — genuine loch-shore seating outside, plus fish and chips, a veggie burger, and comfort classics on the menu — though it leans upscale/formal, so it suits kids and teens better than very young children.