Cost: Day use is free! A camping fee for one vehicle and one site is $12.72. There is a $8.48 charge for an additional car with a max of 2 cars and 8 people per site.
What to expect: A lot of rock, a lot of climbers and mountain bikers, a lot of dogs, and a lot of fun... at least on a busy weekend like Labor Day. I cannot claim any credit for reserving sites, our friends did that. But just know to make reservations ahead of time and if available get a site with not a lot of hiking.
For more information visit: http://www.nps.gov/ciro/index.htm