We are going to be taking a train from Annecy to Chamonix to Brig end of September, then need to take a train from Brig to Brienz. I am having trouble finding a schedule for the Brig to Brienz route. Is this journey doable by train and if so, how long will it take and how many connections? If the train trip from Brig to Brienz doesn't make sense, is there a way to get from Chamonix to Brienz by train if we eliminate Brig, or would it make more sense to go back to Annecy and take the train from there to Montreaux or Bern and then to Brienz? Thank you!