If not for a surveying error (they lost the continental divide), a good part of western Montana would be in Idaho. We were a little bummed out about until we realized it would have included Missoula. Sadly, the Idaho panhandle has also turned out to have a strong attraction for Californians and liberals from all over.
Seriously, tainted by newcomers though it may be, Missoula is still an OK place, for a big city. When I am able to go, the shoots at Missoula are some of my favorites. GD