A lot of what a CTR is like depends on what region/organization you are riding with.
Around here, the local organization (ECTRA) doesn't do things like judged obstacles on trail and specific camp site rules like other organizations do. They do give you a pace window you need to fall into to not lose points and they do the hands-on exams. Most CTRs here offer a variety of distance options (12-15 miles, 1 day 25, 2-day 50, 3-day 80 or 100).
I just did the Glass Ride CTR 2-day 50 over the weekend. That thread (with pictures and video) can be found here
. I did the Chesapeake CTR 2-day 50 back in sept and that thread can be found here