A little planning is definitely in order. With the wildfires which Colorado Dickhead Governer Owens proclaimed: "All of Colorado is Burning", innumerable Coloradans have been forced to make such choices. Our own Lonesome EJ was threatened by fire a couple of years ago. Fortunately, his home was spared, but you can bet your ass he was busy prioritizing.
I know some folks who did have to evacuate. When the Sherrif comes and tells you you have a half-hour to evacuate, it's decision time. My friends had to decide what, from their home and lives, would fit in the back of a pickup truck in the next few minutes.
My friends were evacuated for two weeks. Their house was eventually saved, and they moved back, but the number one thing they didn't take was enough warm clothing, even in the summer. Survival is priority. Warm clothing for the family is more important than old photos or Collings guitars.