I've been asked by Saadia to kill Kematu, who is waiting in Swindler's Cave. I read that when this cave is re-entered after finishing the In my time of need quest, there's a chance the game will crash, making the Companions quest line impossible to complete.
What do I need to do in order to prevent this, other than saving extremely often?
Before entering the cave for the first time, should I wait until Aela gives me the Stealing plans quest? If I wait until Aela gives me her quest (let's say, 2 months in game time), will Saadia's quest crash?
I'm playing on Xbox 360, so console solutions are unavailable.