Rope Trick will keep you safe, but the point is the sweet l00tz. Warlocks and Dragonfire Adepts are good for infinite ammo if you actually want to fight through the undead, but one cleric/rogue could probably turn/hide from the majority of the baddies in there, sweep the treasures into a Handy Haversack or Bag of Holding, and be at home sleeping on gold in two hours' time.