Many reach schools do not take a note of your school visit as a demonstrated interest (see CDS, sect C7). For these schools, therefore, your visit makes no difference in the admissions outcome. Many reach schools are also need based, not merit. Need to do research on each school you’re interested in. Even for those schools that take a note of your visit and are merit based, your visit will not make much of a difference.
We didn’t visit Williams, Amherst, Pomona, Duke, UPenn, Dartmouth, and Princeton. Too far, too costly and too time consuming to visit.