While our Airstream is in Portland, Oregon at Ultimate Airstream being upgraded (we are adding a W/D combo and some storage.) We are spending a month in Jackson, Wyoming. Our VRBO rental is actually in Wilson, WY which is just between the Jackson Hole Mountain Resort (Teton Village) and the town of Jackson.
The Jackson Hole Mountain resort, located in Teton Village has 2 weeks of holiday activities around Christmas and New Years. (They also have other events throughout the season but this time of year they host daily activities.) The mountain is overall busier than the weeks preceding and post the holidays. These apres-ski events make it an appealing time to visit, despite the crowds.