Unless you have a save game from before you entered the Battlefields, you are stuck, I'm afraid <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />
I was really lucky in that when I discovered this bug I had only gone there to shop and hadn't saved the game.
As for Stealth - yeah, trying to play a thief-type character is a waste of time, IMO. There are a lot of very narrow corridors and the game is very fight-heavy. If I were you, I would unlearn any useless skills and revamp the character...