DAD2TWINS,
I think it's a great idea to look at as many different schools as is possible. It's hard with all the baseball, school, work, and other commitments.
We visited colleges every chance we had, particularly early in the process. Baseball tourney trips, holidays seeing family, Spring breaks, etc.
Sometimes we would do what Buckeye suggests, particularly when farther along in the recruiting process. But mostly we just walked campuses. Typically we'd stop at Admissions and fill out a "request info" card so my guys were in the Admissions database and get a campus map. Then we would hit places on campus where my guys were most interested: baseball field, workout facilities, dining hall, and student center. Occasionally we'd get to the library, an academic building, and a dorm, but only if my better half was along!
Once in awhile we'd stop at Admissions just as a tour was going out. We'd do that occasionally, particularly if it was a small group and short tour. One or two information sessions...they all started to sound the same so we stopped doing those.
We'd get to campuses when it worked for us. Sometimes that was in the early evening. Anything to see the campus and get a sense of place.
My guys would have a visceral reaction to most places. They either could or could not see themselves on that campus. The visits were extremely helpful in determining the type of schools (size, location, etc.) my guys wanted to focus on. And any school with a lousy baseball field or crappy workout facilities or field / facilities miles from campus was punted. Always.