Perhaps it was neither. Maybe it may have been Morgan whom Darryl stumble upon. That is why we saw a clip of Michione facial reaction. Remember, she was with Rick and Carl when they met Morgan.
Yeah, but Michonne only briefly encountered Morgan. She doesn't know him. Her face absolutely lit up when she saw Daryl, and we know from Season 4 that they have a deep connection and affection for each other.
I'm wondering if it's Carol helping Beth along.