Last year my orgy was two parties of two. My party got to the festival three hours late. The other got there six hours late. On paper, everything should work fine, but there are several factors that will contribute to people being late (traffic, construction, accidents, working late, or my favorite, "whoops, got way too drunk last night so I can't move").
Not to mention there will be people taking Thursday off, and driving through the day, people working Thursday and driving through the night, and people arriving Friday morning. The way I see it working is having different orgies of boarders located in different areas of the campground. There is already going to be the emptyfox/Peatrick orgy, and the Horned Gramma orgy. If either "orgy" wants to expand, just figure out the most convenient meet up place and time for your orgy, post it on the board (or via PM), and those who can make it join in. Those who can't start their own meet up time for a different orgy. This obviously won't need to be decided for a couple months.
PS. We are probably underestimating how many of us there are, how many friends we all have, and how many lurkers are going to want to join an orgy. We're obviously the coolest of the cool when it comes to Sasquatch, so even if I had zero posts, I'd rather orgy with you all than risk get stuck in an orgy with a bunch of Foo Fighters fans.