Two day trip to Detian AND Tongling Valley from NN

From NN Langdong Bus Station, there is only one direct bus for the DT Waterfall directly. The bus is at 08:30 and reach the waterfall at around 13:00.
After traveling around the waterfall, you can head for Runhu Town (湖润镇), which is the closest town to the Canyon. But the transportation for Runhu may be a little bit complex for you. You can try to hire a local car to Runhu Town or transfer on your own to that town. If you plan to transfer, you need to take a local car for Daxin but get off the bus at Shuolong Town (硕龙镇) where you can take a bus for Xialei Town (下雷镇) and then change a bus for Hurun Town. Stay overnight in Hurun Town and take a local car for the Canyon directly on the next morning.

Since you need to take a bus early in the morning, it is suggested to live near the bus station. I think the Golden Plaza International Hotel is a good choice.