Gosh, those train tickets are expensive! 1/4 of my monthly pay just for the fare. It'd be much cheaper to go by car, but I hate driving so much
For a dancing vacation I'd need a dancing partner first. I'm currently sorta short of those, I have a few friends with whom I go for dancing evening, but I don't think any of them would go on such a vacation with me. Unless you could provide someone local

Weekends would have been enough for the doodle, I guess.
What about a bus ride. Takes about 14 hours but is cheap

I adjusted the doodle. What about the others? Everyone who wants to come, can come. For the others I would set up a Twitch live stream.
I can't go on the 23th I'm afraid. The 22th is my last day in my internship, so I have allot of school stuff to do to officially finish it. The Stream should be doable though.
There are 27 options

look at all of 'em
I'm not able to look in the future, but I guess I'm available on all the other weekends after my internship.
maybe rent a big screen or just microphones and let others participate too, or just talk like teamspeak with one user at the conference and others can just join.
If you think you are available, please set the dates in the doodle poll. This is what I made it for
(t)ze I though about filming the whole party with two cameras and setting up multiple microphones