I only need like two people to help me but I was thinking about 11:15 or 11:30. It wont take very long for us to get everything organized. The main things is that wee need to find a spot to sit. I will bring a blanket and cupcakes (or cake, I'm going to buy it) and that is it. I might need someone to direct people to us.
I would say that the few people I will need help from are the ones bring the most stuff. Did someone say they were going to bring some form of music?
catchxme are you bringing anyone else? If you are then you and whoever is coming should be enough.
As for the others, if you want to show up early then that's fine but I wont be there till 11 or so.