I loved the Jackson Park when I was there. The mountain is probably the greatest you can ski in the lower 48 if not all of North America---if not the entire world, but the park is always there for you.
Keep in mind, it is a GREAT mountain but it's also one of the easiest to get caught up in the moment, do dumb shit that can get you or people around you killed. If your buddy isn't an experienced all mountain skier and you both like park, there is no shame in playing around the park! I can say it with confidence because I know once you see the mountain, you will spend most of your day exploring it and not in the park.
People on here will rip on you for mentioning skiing park, but ski patrol sure wouldn't. The last thing they want is inexperienced people with no gear and no knowledge of the mountain getting themselves into trouble, which like I said is way too easy.
Be safe, and you're going to have a blast whether you ski mountain, park, it snows a bunch or doesn't snow at all.