Most schools say don't bother them, but I submitted not only a letter detailing my continued interest, but each month an update on recent activities/accomplishments. What they don't want is someone to show up for a tour and talk and talk about him or herself. What you can do is take a self guided tour, then turn around saying you visited the school, and if you have already visited, that you visited again, and it just reaffirmed your desire to attend.
Actually, I did not have alum connections at either school. For one I visited personally and kept in touch. FOr the other I had conversation over the phone. What you can do to get a meeting is ask to speak w/ admissions person (again, a decision maker) to discuss the WL process. Ask how they handle the waitlist, do they rank it and so forht. During that conversation you can talk to your desire to attend.
Each month my updates varied from continued success at work w/ expectation of a promotion as told to me by superiors; additional community service that provided me leadership opportunities. They all tied back to my personal statement and application platform. Many times people get off a WL and cannot attend or withdraw interest. Stay the course, keep updating and showing you are on an upward projection.
By having a meeting or a call with someone in decision making process, you've est a connection, someone you can continually update and add your letters to the file.
I'm also a P/T applicant, so that's slighlty different I bet, however, one of the schools I got in is a top 50. My numbers: 2.9/159. Clearly short of typical numbers they expect. But I have 4-5 years of strong work experience and both rec's were v. strong. It was my resume/personal statement that kept me from getting rejected. That was made clear to me by both schools.
In both cases, believe it was my ability to show upward trajectory, keeping consistent/monthly comms w/ the person in the admissions office and just restating that I'd go that got me accepted.
Again, it's quality not quantity. A letter restating previous information does nothing, you have show that you are not complacent and continually pushing yourself.
What are your other options? If you don't get in at Nova, inquire about what if you reapply next year...would tha tincrease your odds? Do NOT do this until they have sent you a letter that the WL process is closed. Otherwise you'd give them the opp to keep from admitting you this year.
Hope this helps.