We loved our stay in Kauai next to the Waimea river. If you stay here, book on a Saturday so you can take the kayaks out on the day there aren’t tourists around! The lanai was our favorite place; we spent every morning out there. Good functional amenities and a spacious house, plus lots of equipment like snorkels, sun hats, etc (though some of the equipment is well-loved). Clean bathroom and the rest of the house too - we didn’t think we’d use the laundry but it came in handy. You can’t really walk anywhere easily due to its location on a very busy road but it’s not far from some nice beaches and restaurants.
The absolutely kind hosts made our stay a great one!