Replying to Colorado Christmas 2016

I finally get to ski outside of Ohio. My aunt has a house in Denver. I know Breck and Vail are nightmares for crowds. I want to ski some nice fast groomers so I don't care about the powder since I don't know how to ski it. My 4 days to ski are 12/20 to 12/23. I want to hit up breck atleast one day since its on my bucket list. My other possible resorts that ive researched are Keystone, Copper, Loveland, Winter Park or A Basin. I wanted to ask the experts for tips since I don't want to end up in hour long lift lines. I made sure to go before Christmas instead of after.