Hi, i was waiting to get in to the battle and i found this silly bug.
I could recreate it a few time, dono if you will have the same luck but worked 5 out of 5 times i tried it.
So down to the bug.
You will need, Noggenfogger Elixir, u buy these in tanaris.
Drink till u become a skeleton, mount up and fly in to wintergrasp, you should get dismounted but will still beble to fly, and after losing the noggenfogger buff you still get to fly with out a mount. tho its only at normal run speed, but u can cast while flying, not while moving tho.
Will get back to u if this works during the battle.