After training with a 65 pound pack your pack this weekend is going to feel like nothing. You probably wont even notice it, at least at the start.
For skiing, I'd hit Wildcat, with caveats. If its really cold you might want to try an area that is less exposed to the weather. Also, some of the other areas probably have more open terrain. So if you want more variety than Wildcat may not be the best choice.