In my point of view, each episode in season 1 had a antagonist. Campman made minor appearances in all episodes until the finale (if you count seeing his car drive by in the very beginning)
Episode 1 - Larry - Lee almost died because of him
Episode 2 - St. Johns - Killed Mark and served his legs for dinner
Episode 3 - Save-lots Bandits - They take what they want and kill anyone who screws with them
Episode 4 - Crawford - Killed the young, the old and the sick, including Molly's sister
Episode 5 - Campman - Kidnapped Clementine
How far are you willing to go to survive?