Previously, it would usually be the OP (usually daigong or another staff member) who'd start up a thread for an event like this, and who'd update the first post with things like "Who's In/Who's Coming", "who's staying where/with whom" and what not.
As the thread-starter this time, if oaxiac is okay with/is able to take care of updating the first post with all that info, then it's all good. Otherwise, it'll pretty much be the responsibilities of the individual JPH!P members who are going to contact each other and co-ordinate all that stuff. Members who can/who are definitely planning on going to this should also continue to post updates for things like hotels/accommodations, arrival & departure times, etc. here in the thread so that there's a record of that information here that everyone can easily access.