[quote=@Chromane]
I suppose it could be sort of like a "World Fair" for different magical schools. Transportation costs aren't an issue given things like apparation and portkeys so it wouldn't be too hard to organize. All the different populations are pretty small, so they'd probably want to meet and exchange ideas and that sort of thing.

Of course things could start going horribly wrong...
[/quote]

Then maybe there should be NPC's (or maybe even characters that we could create with the Gm's permission) To be headmasters of the school in order to communicate back and forth with each other.