Big Sky is big on families; kids 10 and under ski and stay free. Après ski activities for families are bustling at Base Camp. You can tube, snowshoe, bungy jump, zipline or send the kids to Kids Club for fun and games while you enjoy adult après ski at the cowboy style Carabiner bar with Moose Drool beer. We ziplined one afternoon, just $20 for two screaming rides high above the ski slopes soaring 1,500 feet past the high-speed quads and over the village. For a day off the slopes (not a bad idea with such big-mountain, high-elevation skiing), tour Yellowstone National Park by snowcoach or snowmobile to see bison and beautiful geysers.