The canyon itself is surrounded by pine forests, and looks really pretty in winter. There is a boardwalk running through the canyon, and makes for a very pleasant walk. The guidebook suggested that its a 40min walk, but I took almost 2hrs as I love photographing the winter scenes. Moreover, I seem to be the first and only visitor, as the boardwalk is covered with snow with no footprints at all. The boardwalk is on a raised platform, and with heavy snow, the edge of the boardwalk became barely distinguishable. So, extra care must be taken not to accidentally step off the boardwalk!
So, is the additional trip and entrance ticket worth it? Well, I enjoyed myself quite alot in there. However, in other seasons, the sceneries will be different, so your enjoyment mileage may vary :)