I'm sure come Monday we'll have quite a email spam-war going with the 30 involved.
But, weight is some issue. The amount of gear per person isn't unlimited. So the 5-day cooler could be at a cost of other gear. And I know we tote around a lot of gear. Since Propane is NOT allowed on the boat, I bet dry ice isn't either.
Whatever is not in/on your yak is shuttled to the site. Think 30x whatever you bring. Maybe they have a moving van, or something. I guess they have the few hours we'll be on the water to shuttle, but that's getting into Corps of Engineers type of undertaking.
Think minimal. You see how well Tman and Grego want to share space already. And Holy Mack, I'll/we'll have some pre-made batter ready. For, you know, just in case someone wants to have their big-ass fish feed the group.

Z