Brothers in Arms never happened, since it depended on a letter of reference from Raistlin's tutor to the mad Baron, and in my world Raistlin barely stayed long enough to be given the Staff of Magius. They did have some other adventures though, and I'll write a short one out for you.

As for what happened in Hopes End without Raistlin or Caramon present; the Mad Barons army kept the city from being flattened, Kitiara killed the red dragon, and the gold dragon's eggs have been dragged off to hatch lots of little baby draconians- awww *huggles baby draconians*)