Sure they do. The same thing scientists use. It's called *science*.
Science is more than sidetracked by fraud and petty tyrants. It's replete with them. Of course, it matters, because it ruins it, wastes time, and casts a pall on the credibility of those who are doing science with integrity.
If the methodology assumes unchanging laws of nature, it is science, but then it departs from creationism.
Creationism assumes that any phenomenon could be the result of divine intervention. This is the defining difference between the two modes of thinking.Within recorded history, everything from the flight of an arrow through plagues, earthquakes and volcanoes, has been attributed to the action of divinities.
Starting from this assumption, it is impossible to discuss the past in any terms that imply unchanging laws.