Don't know about the bone graft, but I broke my pelvis in two places back in '95. Yeah, I felt that one for a while. Oddly enough, it was the problems with my knee and thumb that gave me the most problem. Once the pelvis was stabilized with a titanium place, it wasn't too bad after than.
Of course, I didn't do a lot of moving for a few weeks after that. Take the time you need to heal, don't over do things, and listen to you physical therapist.