The question seems to be at the moment: do we open each locked door as we go past and check to see what's behind it, or do we check out the area first and then come back to open the doors?
My typical game habit is to check/open each door - that way you don't have creatures coming up behind you. Given what happened to Thistle (standing at the back of the line when he disappeared) this is Narnae's instinct also.
Majority vote rules.