During the bandit quest you have to stop him from going to the camp otherwise he'll be on the bottom Logan path which has some good scenes but for story purposes it'll lock you out from his romance quests and Werewolf event you have to go after Logan when the village is attacked at night otherwise you will be locked out of his romance quests as well. Don't worry going after Logan doesn't lock you out from Bernie's romance stuff cuz I like him as well. Definitely take advantage of the save system before making choices as well as for one time events or scene's you want to see again later on.