I also found the info sessions to be very useful. After sitting through several I was able to hear nuances about what that particular school wants, and was very helpful for the “Why Us” essay, as well as helping our kid decide which schools she’d apply to.
I think our kid visited around 35 schools, I can’t remember exactly because she went to some with me, some with the other parent, some with friends, and some with other relatives. We made the mistake of visiting reach schools first, so we had to visit A LOT of other schools to find two safeties that she’d be happy to attend. It would be better to focus on finding safeties first.
Also, a majority of kids who start college with a major in mind end up changing to something else. So while it’s important that the college has a good program in the anticipated major, be sure that there are enough other good departments that might also be of interest to your kid.