I still think if Shane was leading the way and Rick wasn't around, half of them would be lost by now xD I don't think he'd have any problems cutting the "baggage" loose (Hershel; older, and would surely ditch since he has to use crutches, Beth; generally pretty useless, Carol; again..., The baby; zombie magnet with screaming and crying? etc) and I doubt he'd risk his life to save anyone other than Lori and Carl... and even then, who knows xD