Yes, leaving Carol and Maggie alone is straight out of a Batman TV series episode, allowing them time to do something - but the episode did result in atypical difficulties. What was special was Carol's actions (including her acting) - from the very beginning. Did you notice her marking the ground with her boot, knowing it would help Rick and the group track their location? Carol is the wisest of the group and her character arc is amazing - one of the best in any movie or TV show. Since I have to include one more line of text, here it is.................. Since I have to include one more line of text, here it is..................