Well, I would crowdsource volunteers to handle specific tasks. That's how the convention I work with does it, abd it's rather effective. (granted, yes also a registered educational non-profit, so there's a lot of legal and accounting stuff to worry about, but not needing that makes it much simpler since you'd just be throwing a big party.)
Oh, I certainly didn't mean to imply that you don't care, but you can leave details to delegates that you trust. For example, I could easily handle coordinating documentation, but you would absolutely NOT want me in charge of decorating decisions. Finding people who can work to their strengths is a sign of a good leader.
Hiring an event planner sure is the easy button... LOL!
Honestly, it would depend on the cost. 5 years is pretty much on my timeline for acquiring my 5+ wooded acres. I might be very land-broke (no house yet to be house-broke! LOL), and therefore not able to spend the coin to attend. Would I like to? Yes.
You would be much too busy to spend your time with a wallflower like myself, but as long as there was a comfy couch or something like a comfy overstuffed arm chair to lounge on, I'd be perfectly amenable to chatting with whomever. I. Will. Not. Dance. (Seriously.)
I'm not *that* bad a gatherings. In fact, it's fun as long as I don't have to do it for many days in a row. I used to be in charge of departments at the convention that dealt directly with 100s of attendees daily for 3 days in a row. I do that well, but after, I would rather not talk to anyone for a week. LOL! So, you don't need to worry about me. I'd be more concerned with actively avoiding cameras.
A quiet room is still a good thing to have. There are several set up around the convention hall. They are pleasant if one needs a break from the press of a crowd, but, for my sake, not necessary, though, it embarrasses me to think that you'd take that into account when planning.
5 years seems like a long time, but, depending on scale, that's good, or, just enough time. Who knows what the world will like like then, but, it us good to hold hope for a better future while working towards it.