After USA Today:
"Since pathologists are convinced smoke inhalation is the primary cause of death there are no plans to conduct traditional autopsies, Brown said, but medical examiners will a final determination."
They must be pretty sure about the smoke inhalation death to issue statement like this I think. There must be strong evidence to support that.
I've never been in any fire situation but if all those 34 people woke up, realizing what's going on upstairs, at least some of them would probably try to run thought the fire/smoke using clothes/blankets as a some kind of protection, if meager, from this inferno. Especially if we had 1 crew member sleeping with them, who should in theory be more oriented in the ways they could get out of this situation using emergency exits/hatches/whatever possible way to the outside.
Again, I might be wrong and I welcome and appreciate comments from others here who help me to cross off possible scenarios.