I agree. It was relatively easy for us to visit schools during 7th grade, and if you can do it, I definitely recommend it. Although the typical approach is to do a tour and interview at the same time, we scheduled some tours-only during 7th grade. Schools are pretty accommodating. The only thing to take into consideration is that spring break is long, typically 3 weeks in March, so students would not be on campus, and that revisit days are typically the last week of March and first week of April, so that would not be good times for an initial visit.