They do. I just checked it out with a character that completed the main quest and there is one that appeared at Rorikstead. It looks like he only appears when you visit Rorikstead normally, as he wasn't there when I was doing A Night To Remember quest. Or they only appear after a certain amount of time has passed (without completing the main quest?).
I also tried the firebolting the dragon skeleton trick. Sends it flying and if the npc's where standing around it, they go chasing after it.




