This seems like the easiest plan (let me know if something else looks better):
Friday: Wifey & I will camp out on Friday nite (that way we can pick the best site for our group).
Saturday: The grounds open at 0800 so plan on meeting there to off load gear & grab a cup of coffee. Leave at 1000 to follow CSTYLES to the trail head. After that, we'll be having so much fun that no further plans will be needed (Just plan on returning to the campsite with enough daylight to pitch tents).
Sunday: 'Nother trail ride or ???
It looks like only about 1/5th of the campsites are reserved so unplanned guests, late arrivals, etc are all welcome without reservations.
Weather: Friday - 77-41 degrees & fair, Saturday - 71-45 with 25% chance of sprinkles, Sunday - 67-57 with 25% chance of sprinkles.
http://www.shenandoahriver.com/campoutback.html for directions, maps & phone number.
My Cell number is 540/760-3510 (I have no idea if I'll have reception tho).