Thanks for the update @Laurent_AODYO ...
Taking a closer look at SuperBooth and ... well ... it looks pretty daunting. I'm from the U.S. and it's an 8 hour red-eye each way. Tickets are shown as "Unavailable" on their site (and also no workshop postings).
Then ... accommodations are far away: 50 minute train ride + 10 min walk + 20 minute walk. That's a total of 3 hours of commuting each day.
Then there's the restrictions: can't bring gear (really??), can't buy anything, and "better bring cash".
And now ... No Aodyo ...
Not sure if I'm missing something ...
Is there a better way to do SuperBooth??