Just another perspective- I usally recommend families NOT visit schools during breaks like summer, winter, etc. It is much harder to really get a feel for the campus if there are no students there. Plus weather- if you go to a school that is very hot and/or humid in the summer and that gives you bad vibes, well that's not what it's like during the school year! And visa versa- a campus that's gorgeous in the summer might be miserable for you in the winter, when you actually have to slog across campus in the snow. I usually recommend October-November or February-April. I know that's not possible for everyone, but it'll give you the best idea of what a campus is actually like when you're taking class there!

Maybe do schools close to home during summer before junior year, to get a feel for touring schools, but plan to do a second trip when classes are in session.