Since Ellen was doing that, Dean headed back to the Impala and opened up the trunk. He actually only had knives on him today.
He picked up a handgun, and a sawed-off shotgun. There was also a rifle with a scope, and several other choices.
He figured she probably had a gun on her, at least. But she might want another one. The car was close enough to the barn that he kept the trunk open. The four feet to the barn wasn't much.
He came back inside and handed Ellen the shotgun, looking around at the bottles, then turned around and grabbed a rifle before heading back again.