I see your point, clearly. The practicality of it may throw some challenges into this, there is no doubt. My assumption is that the poll supervisors are able to manage it in such a way that they do not interfere with people voting or lining up to register or whatever it may be. I think if you are going to move ahead and allow media access to the leader, it should be extended to anyone who puts themselves on the ballot.
The practicality of it, as you point out, I take that, clearly, but I think that the poll clerks and the supervisors have enough experience such that they can manage it.