Never heard of anyone on here saying they have ever met with such individuals ahead of the real interview. Typically, MOC interview boards are comprised of several people not directly associated with the MOC, so you may not even know who they are until you arrive for your interview. When interview boards are used, they typically meet with all candidates on a certain day.
As mentioned above, I would expect the interview panel to decline efforts by candidates to meet individually ahead of time with the idea of somehow increasing their chances for a NOM.