Replying to First Trip out West

Sup guys,
In about a week I will be flying out to Breckenridge to ski out west for the first time. Growing up on the East Coast, this is huge for me, because all I have ever known is ice. That being said, I want to make sure I have the best time possible. If anyone has any advice for me, it would be greatly appreciated. Just a few questions I had: Should I bring my own skis or demo a pair? (I currently ride Line Blends) How do I avoid altitude sickness, and what do I do if I get it? I really want to try some of the higher alpine skiing, any advice/suggested runs? Also,does anyone have any apres suggestions? What bars should I go to, what should I avoid, and what is the nightlife scene like?