Generally speaking I think that after taking so much time to :
* get a great score on the GMAT
* write, read, correct and re-write your essays
* spending quite a lot of money in the process (gmat, application fee, ...)
You should try to accept the school's suggestions except if really weird or impossible. I don't think you would like to be refused at any school because of a 400$ trip not done...I exagerate a little but that's my point of view.
also I would tend to choose the solution that would avoid meeting a student or a graduate. I believe that Adcom and officials from the board are much easier to handle however in that case you become totally responsible for impressing them. My meaning is that people from the board of admission usually ask the same general questions :
- walk me through your resume
- why mba
- why now
- short terms/long terms goals
- why X school
- leadership/teamwork experience (behaviour/situation/experiences)
- extra curricular
so it's up to you to find a way to show your best skills and to impress them. They will ask the same questions to thousands of people, so YOU need to find a good answer and a way to differentiate yourself from the others.
I feel that usually graduates (i am not sure about students) are harder to deal with because they don't have a lot of "standard" questions and you are never sure about their mood or their determination to lead well the meeting whereas for the board, it's their job ! SO you can assume they are trained to do so....
Of course I aam sure many people would say the contrary or had experienced opposite situations , that's just my view on it and my personal experience