Best family vacation spots: Casper, Cody, Fort Laramie, and Thermopolis. Things to do with kids: Visit Yellowstone and Old Faithful Geyser. Hike Grand Teton National Park or Fossil Butte National Monument. Checkout Snow King Tube Park and The Wyoming Dinosaur Center. Raft the Salmon river; follow the Oregon Trail. Go hiking, horseback riding, or whitewater rafting. Try Alpine skiing, snowshoeing, or snow tubing. (Image of Yellowstone, NPS.)