Residents of more than 400 homes near this gateway community to Glacier National Park were evacuated tonight as a wind-driven wildfire rounded a mountain and headed for their town. After three short blasts on a siren, deputies went door to door telling people that the moment they had been preparing for had arrived. "It's not a run-for-your-life kind of thing," said the Flathead County undersheriff, Chuck Curry, who was assisting with the evacuation. "We have plenty of time