[They know what they need to do, but ironing out the details of getting there and getting back are pretty important.]

I'm sure you recall the unfortunate incident that got that demon girl killed. They found out later when they went to confront the Gasfella that caused it that she was trying to protect her children. This illness can affect them as well as us, she thought the ones that went out there were carriers, and if we run in to more of them like that out there we may wind up in over our heads.