What camp is it specifically? Also, is Season Unending active for you? That's been known to cause a LOT of issues if you haven't completed the Civil War before picking up that quest.
Eh, currently don't have direct access to my Xbox so I couldn't give the exact name.
And the main quest itself is finished, has been on this character for a long time. So that tidbit is not an issue.
Is there a dragon nearby? I know that if there is, the option to talk to him doesn't trigger. That happened to me on my play through of that quest.
There was a dead elder dragon oddly perched on one of the huts. It was shaking and stuff. But again, I traveled out and back in. The body was gone but Galmar still didn't give the mission.