Here is a link to jeep jamboree's website for the black hills trip:
It's basically an organized trail ride with JJ providing the guides and all the meals. This is my first time on an organized trail run. When I lived in California everybody just showed up to whatever they felt like and went with whoever was there. I went on trail runs with anywhere from 4 to 45 rigs at a time.
I think there might be some spots left but you'll have to hurry to get in.