General consideration: ryde sharing + stopover at allies
The location & logistics question just rattled lose a thought (just thinking aloud):
With an event happening in somewhat out of the way places it might be possible to “band together” at one or two hubs before the last leg of the trip, maybe even for a day of stopover at a potential ally. If the mode of transportation allows (e.g. train or ship) one could already begin the meeting while moving among the public?
The latter part could also work for a centrally located place like Brussels. One could also argue that working together “on the fly” is fundamentally an important skill for collaborators/connectors (especially if you can involve several contacts along a path) in dispersed networks. Being able to coordinate travel to increase likelihood of face-time and cross-pollination would be pretty nice.