I tried it (as far as snow conditions permitted), and was disappointed. First, itīs very far from Horsetail, so youīd need a really long lens. Second itīs difficult to find a good spot to set up the camera, without trees in the foreground. And the use of chain saws is not permitted in Yosemite Valley, as far as I know. In any case you would be limited to a very narrow angle, determined not so much by how you would like to compose your shot, but by the conditions there instead. Finally, officially this trail is closed in winter, and for good reason. Getting up there with your equipment on the back will be dangerous when the trail is covered with snow and/or ice - not to mention the fact that you simply might not find your way. I should say, though, that I did not climb the second switchback - too much snow up there. However, I believe this would bring you too far away from the falls anyway.