Few thoughts about Yangshuo.
The show was produced by John Emo who did the olympics plus films such as Crouching Tiger Hidden Dragon. For the show IMHO the best place to sit is at the first wide aisle, about halfway through a lot of dancers come here in traditional dress and its a good photo opportunity. At the front you will be looking at the back of their heads.
The area is changing a lot and its getting harder to find great views around the town as they are now building upwards. The view shown on the CCTV of the mountains behind Yangshuo, which is magnificent no longer exists, without heavy photoshop removing modern buildings. (Chinese tourist photo's are not subject to our standards authority quality testing and are usually quiet old. In fairness to the Chinese they don't seem to mind, so the system works for them. I have been disappointed several times however)
Think you would find a lens that doesn't take filters a problem as you will really need ND grads to get the best from an image, or bracketing, also a TSE 24mm or 17 as suggested may be a better panoramic view as you would loose a lot from a 14mm crop. Depends on time really. I like the view from the Yulong Bridge, which is great, depending on the light. Haven't experienced much in the way of visibility issues other than rain, the mist adds drama to the kunst mountains, so long as you are prepared for it. Polarisers help a lot with keeping the foliage natural, and reducing reflections in the water, not really seen much in the way of sun in the area.