Though Rogwan finished it before me, I proved once more it's definitely doable without any help like chopper, summons etc. There are only two summons in my statistics and both happened when I was doing For the Alliance! achievement. Some subzones are a bit tricky, but as Rogwan was stating in his post, there are certain ways how to deal with these.
I've enjoyed that journey a lot, I was able to see lot of places I would otherwise never see because you mostly fly across that. Even though it's not that difficult to avaid mobs, there are still places where you just can't avoid them, so I have enough of a grey world for some time, enough of corpse running from badly positioned spirit healers. Time to hit that 2k achievement points and than see how far I can get with lvl 1 endgame...