Interesting, the label for the torpedo bay docking port changes; when Kirk's party arrives at the beginning of the movie and in the funeral scene, it's "2," but during the "loading the cannons" scene before the final battle, it's "4."
I don't know if I'd count the gangway on the saucer rim as a docking port; it doesn't have the standard collar, after all (and it's debatable whether the ones on the lower saucer are "supposed to" have docking collars, or if they just use the same circular hatch. I figured they did, since there's just enough space in the recess for a travel pod, but YMMV).
Where's there an external label on the bridge airlock? I don't remember seeing anything like that.