Here is a post I had on my blog that might be helpful to you.

What to wear on a campus visit
So I have been getting ready for my campus visit to Kenan-Flagler. I didn't see a lot of information about what to wear, so I decided to write a post on what I feel is appropriate for different types of campus visits. To me, there are really three different types of campus visits.

1) Campus visit meeting with students, touring campus, and sitting in on a class (no interview)
2) Interview only
3) Both 1 & 2 in the same visit

Campus visit meeting with students, touring campus, and sitting in on a class (no interview)
My visit to Kenan-Flageler will fall under number one. So the question is "what is appropriate to where for a campus visit only with no interview?" In my opinion, you don't want to stick out too much when you are meeting with the students and sitting in on a class. Therefore, I feel that business casual is appropriate. I will be wearing a pair of dress pants and a dress shirt. In my opinion, a pair of nice khakis is appropriate as well.

Interview Only
This is a no-brainer. You MUST where business professional to an interview. I won't go into details on what type of suit to buy because I plan to do that in a future post.

Campus visit and interview
This is probably the most complicated scenario of the three. Again, you must where a suit to the interview portion of the visit. However, you may consider going with a business casual approach for the rest of the visit. This is appropriate IF you have a break to change. My suggestion would be to lose the suit jacket and keep the shirt and tie on. However, I would recommend reaching out to a current student to see what he/she recommends.

When I visited Yale I was in a group of about 20 prospective students. I didn't know that I would be in a group where about 1/2 of the people were there to interview and the other half just for the activities.

I wore dress pants and a light blue button down shirt underneath a navy blue v-neck sweater. (Had to go keep with Yale's color scheme ) I felt properly dressed given my reason for being there. I didn't feel under-dressed standing next to those who interviewed and were in suits, and I didn't feel overdressed standing next to people in just shirts and ties. Other students who were in the group not there for an interview wore dress pants & ties. Girls wore knee length skirts, WITH STOCKINGS/LEGGINGS, heels - didn't see any flats. Some girls were in suits with button down shirts underneath, but be careful with how many buttons you decide to unbutton. I thought a couple were inappropriate.

I wouldn't recommend wearing jeans with a shirt and tie... it looks weird normally, let alone on a b-school visit. Polish your shoes too... it adds an extra touch!

Which school(s) will you be visiting?