Honestly all those areas are generally nice and safe. The only problem you might run into is the Utah culture, Mormonism is deeply rooted in the culture. Its not bad at first because people are really nice but eventually it just gets annoying with people constantly trying to push it on you. All the non-mormon people I've met in school that grew up in Utah agree it was really tough growing up not being mormon. Its easier to deal with it as an adult but your kids might have a tough time adapting to the culture. Besides that all the areas you mentioned are great and about the same distance from great ski resorts except for park city(which is closer),but I would really think twice about a daily commute through that canyon during the winter.