So this didn't work for me precisely, I had to go a little further to avoid the crash. AreaTransition AR_0705_Gilded_Vale North1 got me back to the town and back to adventuring.
You beat me to this. I shouldn't have stepped away before posting. =p
Confirmed. This worked for me too. But I did not finish the quest at the keep and now I'm afraid to go anywhere near the keep. I hope the quick-fix is coming soon.
p
Btw. I tried going back to the keep ever since it's always black screen + not responding. Luckily you can avoid this and progress along the main quest line. Pity tough.