K2 is more technical than most of HF and you need to be careful picking your lines because the rocks aren't as forgiving as a lot of the terrain at HF. More of a rock crawling than trail riding feel for sure. It was raining pretty good when I went, and I must say that I definitely prefer K2 in the rain. I went to HF last weekend and slid all around and had a hell of a time going up most obstacles (got winched up penthouse when I normally just drive right up) but the granite at K2 is like sandpaper and you just stick.
Incase you didn't know, there will be another park similar to K2 expected to open in January. If I'm not mistaken, it will be open year round unlike K2. The website is
http://www.wolfcaves.com/home.html