I was recently there and they were closed for a private party. I would just check before heading over. I was so disappointed to miss it.
Also, the way I understand it, it’s 270 from final dose, but once you’re boosted they don’t check. I was over 270 earlier this summer for another trip, and I was not questioned. The last trip, I did get a second booster. The 270 days seems to refer only to the initial round.