OK, I found two threads that cover the subject:
https://forum.atlas-games.com/t/questions-regarding-arcadian-travel/11480/1
https://forum.atlas-games.com/t/questions-about-arcadian-travel/10936/1
Of the two, the second seems to be the most useful, particular the reference to RoP: Faerie pp. 24-25 in the second post--the section in question helpfully provides color text that justifies travel of unlimited distances.
It's notable that no one in either thread seems to suggest a need to make multiple rolls. Mind you, even without this, Viola still needs to find a regio. And we need to figure out what happens on a failed roll, because that's a very real possibility. Nonetheless, if we could find a regio with an aura of, say, 3, that would be Craft 2 + 1 for specialization +2 Per + Aura 3 + stress die of 7 or more--not totally out of the realm of the possible. And with an AC, it would be easy to make a return round trip.
Scott