Replying to Necessary items for trip out west

Yo Newschoolers! I'm from Wisconsin and have spent my days skiing on icy hills like Afton Alps and Granite Peak. My roommates and I are planning to have a 4 or 7 day trip out west with 4 or 7 day passes from EPIC. I currently have LINE Traveling Circus skis and Alpina FS 360 boots and average poles, pants, jacket, mittens, helmet and goggles. What are necessary items for a successful trip out west? Do I need better skis (if so, what would be good options)? What do I need to know about skiing out west versus skiing on icy hills in the Midwest? Let me know anything that may aid me in my voyage out west!