Roleplaying wise, perhaps not.
Would you really take a vacation and tour the sword coast after all your brother has done to you?
That said, there is really nothing to stop you. No time limit set for when you have to visit him.
So yeah, its a good time to do your 'loose' quests
[ 10-04-2003, 06:21 AM: Message edited by: Dace De'Briago ]