Hey Frank, What time are you planning on getting to the trailhead?
Jake, I would like to say that we will be there by 11:00AM, but if the group is as big as it's starting to look, it may well be a bit later. It's easily a half-hour drive from the Visitor Center, and herding everyone out of there by 10:30AM could be tough. Realistically, we'll get there probably be closer to 11:30AM or so. I would make the Visitor Center meet time earlier, but it is a long drive for many.
Send me your cell number, there is usually reception at the trail head and most of the roadways out there, we can talk in case we'll be late or there is a change of plans. My number is in the first post.
Where are you planning to camp on Friday?