I have never been but my wife likes Montana. She was trying to convince me to move there before we purchased a property in the ski resort town we live in now around 3.5 years ago. We had a plan to sell my business and get out of the city. Which we finally executed in January of 22 but decided to stay in Canada to be close to my parents. Which is one of the reasons I am only looking to spend part year in US.
Montana, but watch out for unexpected Chinese weather balloons.