We live in Denver and have a condo in Keystone. I would look into Keystone, Copper Mountain or Winter Park. Keystone is great for families. They offer free lift tickets for kids (with a paying adult), they have a great tubing area and a snow castle for the kids. If you have more than 4 people in your car you can park in the first couple of rows of the parking lot. We also love Copper Mountain. Great place for beginners. As for lodging, each of resorts has their own central reservations. There is also a property management company that competes with the resorts called Skyrun. Their website is skyrun.com. Good luck.